True bugs (Heteroptera) assemblage and diversity in the - Bulletin of insectology

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Bulletin of Insectology 74 (1): 65-78, 2021
                                                                              ISSN 1721-8861            eISSN 2283-0332

  True bugs (Heteroptera) assemblage and diversity in the
ecological infrastructures around the Mediterranean vineyards
Kristijan FRANIN1, Gabrijela KUŠTERA FRANIN2, Branka M ARIČIĆ1, Šime M ARCELIĆ1, Marina PAVLOVIĆ1,
Tomislav KOS1, Božena BARIĆ3, Žiga LAZNIK4
1
  Department of Ecology, Agronomy and Aquaculture, University of Zadar, Croatia
2
  Local action group LAURA, Biograd na Moru, Croatia
3
  Department of agricultural zoology, Faculty of Agriculture, University of Zagreb, Croatia
4
  Biotechnical Faculty, Department of Agronomy, University of Ljubljana, Slovenia

Abstract

One of the main tools in Integrated Pest Management (IPM) is habitat management known as ecological infrastructure. Ecological
infrastructures play an important role in enhancing biodiversity in perennial plantations such as vineyards. Moreover, elements of
ecological infrastructure such as weeds and flowering plants enhance the population of beneficial insects, in particular, natural
enemies of vineyard pests. The study was carried out during three consecutive years in three different models (extensive, integrated
and organic) in Zadar county (Croatia). The main objective of this research was to assess the effects of three types of ecological
infrastructures (weed margins, wildflower strips, and Mediterranean dry pastures) on true bugs (Heteroptera) composition and di-
versity. During the study period from May to October for three consecutive years (2010-2012), 4158 individuals belonging to 14
families, 30 genera and 58 species were recorded. Species richness and abundance were higher in both weedy margins and wild-
flower strips. The highest number of species was found in ecological infrastructures associated with integrated vineyard. Nysius
graminicola graminicola (Kolenati) was considered as the dominant species within the whole study. The most abundant predators
were Macrolophus melanotoma (Costa) and Orius niger (Wolff). Unlike Mediterranean dry pastures, the population of beneficial
species was also more abundant and diverse in weedy margins and wildflower strips. Our results emphasize the need for maintaining
ecological infrastructures in order to enhance the biodiversity of true bugs and overall arthropod biodiversity in vineyard landscapes.
Moreover, weed margins and wildflower strips seem to have an influence on attracting and conserving the beneficial Heteroptera
in agroecosystems. This results could help to improve conservative biological control as a part of IPM in vineyards.

Key words: biodiversity, ecological infrastructure, true bugs, vineyards, weeds.

Introduction                                                         Insectary plants also known as flowering plants within
                                                                     and around vineyards enhance the activity and density of
Integrated Pest Management (IPM) practices refer to eco-             natural enemies (Landis et al., 2005; Wong and Frank,
logically-based pest control (Wilson and Daane, 2017).               2013; Lu et al., 2014). Weeds can also serve as a habitat
According to Naranjo et al. (2014), biological control is            for insect pests, thus their presence may suppress pest
a key ecosystem service of IPM. Moreover, conservation               transition into the vineyard. Ecological infrastructures do
biological control as a part of IPM strategy is a sustaina-          not only serve as a source of natural enemies, but it can
ble approach to pest management, which can contribute                also reduce soil erosion and conserve water in the soil.
to reduction in pesticide use (Altieri 1999; Begg et al.,              True bugs are an ecologically very diverse group of in-
2017). Snyder (2019) showed that conservation biologi-               sects (Lundgren, 2011). Their sensitivity to ecological
cal control techniques may support natural enemy biodi-              factors and side effects of pesticide treatments make them
versity. Furthermore, IPM promotes and preserves biodi-              good indicators of ecological change (Fauvel, 1999).
versity and establishes a more sustainable agroecosys-               Orabi et al. (2010) in their study confirmed Heteroptera
tem. One of the main problems related to vineyard pests              as bioindicators of environmental conditions and change.
seems to be monoculture production. Moreover, intensi-               All developmental stages of these insects live in the same
fied farming practices lead to a loss of species biodiver-           environment (Fauvel, 1999). According to Gilbert et al.
sity (Attwood et al., 2008). Among different manage-                 (2015), some Heteroptera are sensitive to habitat changes
ment regimes, organic vineyards favour a range of taxa               which makes them good indicators of habitat quality.
(Hole et al., 2005). For instance, Froidevaux et al. (2017)          True bugs are an important group of insects in vineyard
found that abundance of arachnids in Mediterranean                   production, such as phytophagous insects but in particu-
vineyards was positively associated with vegetation                  lar as natural enemies. Some authors agree that some-
cover. According to Wilson and Daane (2017), non-crop                times certain species of these insects can cause damage
species can attract and maintain beneficial insects in ag-           to grapes (Arzone et al., 1990; Paoletti, 1999; Schaefer
ricultural settings and increase agrobiodiversity. Loso-             and Panizzi, 2000; Leskey et al., 2012). For instance, spe-
sová et al. (2003) noticed that European vineyards offer             cies belonging to the genus Lygus (Miridae), Piesma
a high range of plants, especially weeds around and be-              (Piesmatidae) and Nysius (Lygaeidae) were found as vec-
tween rows. Surrounding vegetation, meadows, weeds,                  tors of some important pathogens (Mitchell, 2004).
and wildflower strips are components of ecological infra-            Orságova et al. (2011) reported that Lygus rugulipennis
structure which provide shelter to beneficial arthropods.            Poppius act as a vector of some grape viruses. Except
from true bug phytophagous species in vineyards, some          or sites dominated by several species with high occur-
authors mentioned beneficial Heteroptera species as well       rence) will be less attractive to Heteroptera, particularly
(Lozzia et al., 2000; Rogé et al., 2009). For instance,        beneficial species. The ecological infrastructure types
predatory species from the genus Orius (Anthocoridae),         were: (1) weedy margins (WM) within the vineyards as a
Nabis (Nabidae) and Geocoris (Lygaeidae) are important         board margin situated along the vineyard rows, charac-
predators of leafhoppers, spider mites, including lepidop-     terized by typical weed plants, dominated mostly by an-
teran and hemipteran eggs (Costello and Daane, 1999).          nual and biennial dicotyledonous species and about 2 m
Some Heteroptera (Anthocoridae, Miridae, Nabidae and           width. The ground vegetation was mowed once in April,
Reduviidae) are involved in biological control of grape        (2) wildflower strips (WFS) associated with a board veg-
moths (Thiéry et al., 2018). Malacocoris chlorizans            etation of field paths with a distance of at least 10 to
(Panzer) is known as a predator of red mites (Chuche and       20 m from the edge of the vineyard, and (3) Mediterra-
Thiéry, 2014). The predatory species Nabis americoferus        nean dry pastures (MDP) used for extensive livestock
Carayon and Zelus renardii Kolenati also inhabit vine-         (sheep and goats) grazing and dominated mostly by Po-
yards (Costello and Daane, 1999). According to the data        aceae. MDP were about 30 to 50 m away from the vine-
of Schuman et al. (2013), some Geocoris species feed on        yards.
Empoasca spp. Besides this, true bugs serve as an im-
portant food source for many insectivorous animals and         Insect sampling and determination
therefore contribute to greater agrobiodiversity (Gilbert        Sampling took place from the beginning of May to the
et al., 2015). Zurbrüg and Frank (2006) noticed that veg-      beginning of October during three consecutive years
etational structure and flower abundance are key factors       (2010-2012). Samples were taken every fifteen days us-
in Heteroptera richness and community structure.               ing a sweep net during sunny and calm weather, between
  The first objective of this research was to address what     10:00 a.m. and 4:00 p.m. A sweep sample consisted of 50
type of ecological infrastructure provides the best condi-     sweeps with a 40 cm diameter entomological net. Sam-
tions for Heteroptera biodiversity, in particular, predatory   pled bugs were stored in ethanol (70%) until the determi-
species. Moreover, we wanted to select plants (habitat)        nation. Identification was done using entomological pub-
which could encourage beneficial organisms to provide          lications (Stichel, 1955; Wagner and Weber, 1964; Wag-
natural control of vineyard pests.                             ner, 1971; Péricart, 1987; 1998; Derjanschi and Péricart,
                                                               2006). All collected Heteroptera adults were sorted ac-
                                                               cording to species level while nymphs were identified at
Materials and methods                                          a family level.

Study sites                                                    Vegetation sampling
  The experiment was conducted in Zadar county (Croa-            All vascular plant species were recorded once per site
tia). According to the Köppen climate classification, the      during each growing season. Plant identification was car-
study sites belonged to the Mediterranean climate types        ried out using the Croatian Flora (Rogošić, 2011). In or-
(Csa) characterized by wet and mild winters and hot, dry       der to determine the relative species abundance and plant
summers (Bolle, 2003). Mean annual temperature was             richness, the phytosociological Braun-Blanquet method
25 °C and precipitation was 85.3 mm. Ecological infra-         was used (Poore, 1995). The standard plot size for sam-
structures around three vineyards (each with a different       pling that was used was approximately 30-50 m2. Three
type of farming system; integrated, extensive and or-          transects were made for each site. In each area, all the
ganic) were chosen. In the integrated vineyard (I)             plants were identified and for each species a code was
(44°09'25.6''N 15°26'12.6''E) synthetic insecticides and       assigned based on its contribution (% of coverage) to the
fungicides were used. The ground cover between rows            area. An additional 9 plants as follows (Anthemis arven-
was mowed several times during the growing season.             sis L., Daucus carota L., Ditrichia viscosa (L.) Greuter,
Within-row weeds were controlled using herbicides              Euphorbia spp., Hedera helix L., Plantago lanceolata L.,
(glyphosate). The extensive vineyard (E) (44°08'01.8''N        Rubus spp., Trifolium pratense L. and Trifolium repens
15°15'15.0''E) as a part of small family fields (vineyards,    L.) were selected during the growing season and from
olive orchards, vegetable fields) was surrounded by ele-       which insects were collected. These particular plants
ments of ecological infrastructures (weed margins, wild-       were identified as a possible habitat for beneficials ac-
flower strips, natural hedges, bushes and typical Mediter-     cording to the literature data but also by our own prelim-
ranean dry stone walls). In this vineyard fungicides (cop-     inary observations.
per) were used when necessary. In the organic vineyard
(O) (44°15'09.8''N 15°25'54.0''E) only copper and sul-         Statistical analyses
phur fungicides were allowed as well as botanical insec-         Correspondence analysis (CA) was performed to ordi-
ticides extracted from common nettle (Urtica dioica L.)        nate the ecological infrastructures on the basis of the
and field horsetail (Equisetum arvense L.). Weeds were         abundance of predatory species. Data for this method
controlled by mechanical methods. At each site, three dif-     were presented in a two-way table, with the rows corre-
ferent types of ecological infrastructures were delimited      sponding to predatory species and columns to ecological
due to the distance from the vineyard and vegetation           infrastructures. This method was calculated on a matrix
structure (number of plant species). According to the pre-     p × n, where p presented predatory species and n the eco-
liminary observations, we presumed that sites with             logical infrastructures (Manly and Navarro, 2017). In or-
poorer vegetational structure (a lower number of species       der to provide information on arthropod biodiversity and

66
richness several indices were calculated (Shannon-Wie-         to Tischler (1949) as follows; eudominant (>10%), dom-
ner Diversity Index, Simpson Diversity index, and Sören-       inant (5-10%), subdominant (2-5%), recedent (1-2%),
sen Index) (Magurran, 2004). Diversity indices were sta-       and subrecedent (
Table 2. Families and species of true bugs (Heteroptera) collected in ecological infrastructures. Integrated (I), exten-
 sive (E), organic vineyard (O). Food preferences: Phy, phytophagous; Zoo, zoophagous.
Family          Species                                                             I     O     E    Food preferences
Alydidae        Camptopus lateralis (Germar 1817)                                   +     +     +          Phy
Anthocoridae    Orius niger (Wolff 1811)                                            +     +     +          Zoo
Berytidae       Neides spp.                                                         -     -     +          Phy
                Centrocoris variegatus Kolenati 1845                                +     +     +          Phy
                Coreus marginatus marginatus (L. 1758)                              +     +     +          Phy
Coreidae
                Coriomeris spp.                                                     +     -     +          Phy
                Gonocerus acuteangulatus (Goeze 1778)                               -     -     +          Phy
                Geocoris ater (F. 1787)                                             +     -     -          Zoo
                Geocoris erythrocephalus (Lepeletier et Serville 1825)              +     +     +          Zoo
                Geocoris megacephalus (Rossi 1790)                                  +     -     +          Zoo
                Geocoris pallidipennis pallidipennis (A. Costa 1843)                +     -     -          Zoo
                Beosus maritimus (Scopoli 1763)                                     +     -     -          Phy
Lygaeidae       Lygaeus equestris (L. 1758)                                         +     -     +          Phy
                Spilostethus saxatilis (Scopoli 1763)                               +     -     -          Phy
                Metopoplax ditomoides (A. Costa 1847)                               +     -     -          Phy
                Nysius graminicola graminicola (Kolenati 1845)                      +     +     +          Phy
                Paromius gracilis (Rambur 1839)                                     +     +     +          Phy
                Raglius alboacuminatus alboacuminatus (Goeze 1778)                  +     -     -          Phy
                Adelphocoris lineolatus (Goeze 1778)                                +     +     +          Phy
                Deraeocoris schach (F. 1781)                                        -     -     +          Zoo
                Deraeocoris serenus (Douglas et Scott 1868)                         +     -     +          Zoo
                Dicyphus globulifer (Fallen 1829)                                   -     -     +       Zoo-Phy
                Lopus decolor (Fallen 1807)                                         +     -     +          Phy
Miridae         Lygus pratensis (L. 1758)                                           +     +     +          Phy
                Macrolophus melanotoma (A. Costa 1853)                              -     +     +       Zoo-Phy
                Macrotylus atricapillus (Scott 1872)                                +     +     +          Phy
                Notostira elongata (Geoffroy 1785)                                  +     -     -          Phy
                Taylorilygus apicalis (Fieber 1861)                                 +     -     -          Phy
                Trigonotylus ruficornis (Geoffroy 1785)                             +     +     +          Phy
                Nabis punctatus punctatus A. Costa 1847                             -     +     -          Zoo
Nabidae
                Nabis pseudoferus pseudoferus Remane 1949                           +     -     +          Zoo
                Aelia rostrata (Boheman 1852)                                       +     -     +          Phy
                Ancyrosoma leucogrammes (Gmelin 1790)                               +     +     +          Phy
                Carpocoris fuscipinus Boheman 1851                                  +     +     +          Phy
                Carpocoris purpureipennis De Geer 1773                              +     -     -          Phy
                Dolycoris baccarum (L. 1758)                                        +     +     +          Phy
Pentatomidae    Eurydema ventralis Kolenati 1846                                    +     -     +          Phy
                Eysarcoris ventralis (Westwood 1837)                                +     +     +          Phy
                Graphosoma lineatum (L. 1758)                                       +     -     +          Phy
                Nezara viridula (L. 1758)                                           +     +     +          Phy
                Rhaphigaster nebulosa (Poda 1761)                                   +     +     -          Phy
                Staria lunata (Hahn 1835)                                           +     +     +          Phy
Plataspidae     Coptosoma scutellatum (Geoffroy 1785)                               +     -     +          Phy
Reduviidae      Rhynocoris rubricus (Germar 1814)                                   +     +     +          Zoo
                Chorosoma schillingi (Schilling 1829)                               -     +     +          Phy
                Corizus hyoscyami hyoscyami (L. 1758)                               +     +     +          Phy
                Liorhyssus hyalinus (F. 1794)                                       +     +     -          Phy
                Maccevethus spp.                                                    -     -     +          Phy
Rhopalidae
                Rhopalus parumpunctatus Schilling 1829                              +     -     +          Phy
                Rhopalus subrufus (Gmelin 1790)                                     +     +     +          Phy
                Stictopleurus abutilon (Rossi 1790)                                 +     +     +          Phy
                Stictopleurus punctatonervosus (Goeze 1778)                         +     +     +          Phy
                Eurygaster maura (L. 1758)                                          +     +     +          Phy
Scutelleridae   Odontotarsus purpureolineatus (Rossi 1790)                          +     -     -          Phy
                Odontotarsus robustus Jakovlev 1884                                 +     +     +          Phy
Stenocephalidae Dicranocephalus agilis (Scopoli 1763)                               +     -     -          Phy
                Kalama tricornis (Schrank 1801)                                     -     +     -          Phy
Tingidae
                Tingis grisea Germar 1835                                           -     +     +          Phy

68
Results                                                          Table 3. Heteroptera composition (%) collected in eco-
                                                                  logical infrastructures around integrated vineyard.
Plants
   In total, 50 vascular plant species belonging to 13 fami-     Species                                                %
lies were identified in this study (see appendix). The fam-      Camptopus lateralis                                  8.77*
ilies with the most species richness were Asteraceae (14         Orius niger                                          6.87*
species), Poaceae (12 species) and Fabaceae (7 species)          Centrocoris variegatus                                0.27
(table 1). Few species (Cynodon dactylon L., A. arvensis         Coreus marginatus marginatus                          0.90
and Avena sterilis L.) often occurred in WM, until               Coriomeris spp.                                       0.27
D. carota was highly associated with WFS and MDP of all          Beosus maritimus                                      0.54
sites. Species richness in the integrated site ranged be-        Geocoris ater                                         0.72
tween 19 (WM) and 7 (MDP). In WM plants that exhibited           Geocoris erythrocephalus                              1.71
the highest abundance were A. sterilis, Bromus racemosus         Geocoris megacephalus                                 0.09
L., P. lanceolata and Dorycnium hirsutum (L.) Ser., while        Geocoris pallidipennis pallidipennis                  0.36
in WFS D. carota, Foeniculum vulgare L., and T. repens           Lygaeus eqestris                                      0.45
dominated. In the MDP of this site D. carota was consid-         Metapoplax ditomoides                                 0.09
ered as the most common species. The number of taxa rec-         Nysius graminicola graminicola                      35.29*
orded was 35 in the ecological infrastructure of the exten-      Paromius gracilis                                     0.63
sive vineyard. Among all identified species, 26 occurred in      Raglius alboacuminatus alboacuminatus                 0.36
WM. The most abundant plants were A. arvensis, C. dac-           Spilostethus saxatilis                                0.09
tylon, Amaranthus retroflexus L. and Chenopodium album           Adelphocoris lineolatus                               1.09
L. In WFS A. sterilis, B. racemosus, D. carota, D. viscosa       Deraeocoris serenus                                   3.98
and Dactylis glomerata L. dominated. The plant commu-            Lopus decolor                                         0.36
nity cover in the extensive site decreased from 26 species       Lygus pratensis                                       4.79
in WM to 9 species in MDP. The dominant plant in MDP             Macrotylus atricapillus                               1.80
was A. sterilis. In the organic vineyard, 23 plant species       Notostira elongata                                    0.18
were found (among them 19 in WM, 14 in WFS and 11 in             Taylorilygus apicalis                                 1.99
MDP). Dominant species in WM were C. dactylon, D. hir-           Trigonotylus ruficornis                              6.24*
sutum and D. viscosa. In WFS D. viscosa, Briza maxima            Nabis pseudoferus pseudoferus                         2.98
L. and D. hirsutum were considered as dominant species.          Aelia rostrata                                        0.18
The most common species within the MDP were Aegilops             Ancyrosoma leucogrammes                               1.08
neglecta Req. ex Bertol, A. sterilis and D. carota.              Carpocoris fuscispinus                                1.99
                                                                 Carpocoris purpureipeniis                             0.09
True bugs                                                        Dolycoris baccarum                                    1.62
  During this research, a total of 4158 individuals belong-      Eurydema ventralis                                    0.09
ing to 14 families, 30 genera, and 58 species were found.        Eysarcoris ventralis                                  0.72
All Heteroptera species are listed in table 2. The most com-     Graphosoma lineatum                                   0.54
mon was Nysius graminicola graminicola (Kolenati) with           Nezara viridula                                       0.54
1014 individuals, comprised about 25% of total capture.          Rhaphigaster nebulosa                                 0.09
The highest number of collected species was found in WM          Staria lunata                                         0.27
associated with the integrated vineyard. On the other hand,      Captosoma scutellatum                                 0.09
in MDP, around the organic vineyard the number of spe-           Rhynocoris rubricus                                   0.54
cies showed the lowest value. Tables 3, 4 and 5 illustrate       Corizus hyoscyami hyoscyami                           0.63
the Heteroptera composition (percentage of individuals) in       Liorhyssus hyalinus                                   2.62
different ecological infrastructures. Species represented        Rhopalus parumpuctatus                                0.18
below 2% were considered to be recedents or subrecents           Rhopalus subrufus                                     1.53
and are not shown in the results. The community structure        Stictopleurus abutilon                                2.17
of the ecological infrastructures around the integrated          Stictopleurus punctatonervosus                        1.99
vineyard was dominated by N. graminicola graminicola             Eurygaster maura                                      0.36
(35.29%), Camptotus lateralis (Germar) (8.8%) and Orius          Odontotarsus purpureolineatus                         0.09
niger (Wolff) (6.9%) (table 3). In ecological infrastructures    Odontotarsus robustus                                 0.72
of the extensive vineyard, N. graminicola graminicola was        Dicranocephalus agilis                                0.09
also found as a dominant species (43.18 %), followed by          * highest values.
Macrotylus atricapillus (Scott) (13.5%) and Macrolophus
melanotoma (Costa) (5.35%) (table 4). The most abundant
species in the ecological infrastructures of the organic vine-   The Shannon-Wiener Diversity Index showed significant
yard were M. atricapillus (58.0%), N. graminicola grami-         diversity (F = 7.522; df = 2; p = 0.023) between the eco-
nicola (9.2%), M. melanotoma (7.79%) and Lygus praten-           logical infrastructures associated with organic vineyard
sis (L.) (5.35%) (table 5). The Simpson Diversity Index          (figure 2) with the greatest diversity in ecological infra-
differed significantly (I: F = 8.491; df = 2; p = 0.018, O:      structures within the integrated site. The highest similarity
F = 5.415; df = 2; p = 0.045) between ecological infrastruc-     between ecological infrastructures (Sörensen Index) oc-
tures associated with integrated and organic sites (figure 1).   curred with integrated and extensive site (0.78) (table 6).

                                                                                                                           69
Table 4. Heteropotera composition (%) collected in eco-       Table 5. Heteropotera composition (%) collected in eco-
 logical infrastructures around extensive vineyard.            logical infrastructures around organic vineyard.
Species                                               %       Species                                             %
Camptopus lateralis                                  1.68     Camptopus lateralis                                0.93
Orius niger                                          1.68     Orius niger                                        0.28
Neides spp.                                          0.04     Centrocoris variegatus                             0.93
Centrocoris variegatus                               1.13     Coreus marginatus marginatus                       0.85
Coreus marginatus marginatus                         0.99     Geocoris erythrocephalus                           0.18
Coriomeris spp.                                      0.24     Nysius graminicola graminicola                    9.20*
Gonocerus acuteangulatus                             0.24     Paromius gracilis                                  0.09
Geocoris erythrocephalus                             0.94     Adelphocoris lineolatus                            0.56
Geocoris megacephalus                                0.34     Lopus decolor                                      2.91
Spilostethus saxatilis                               0.14     Macrolophus melanotoma                            7.79*
Nysius graminicola graminicola                     43.18*     Macrotylus atricapillus                           58.02*
Paromius gracilis                                    0.09     Lygus pratensis                                   5.35*
Raglius alboacuminatus alboacuminatus                0.19     Trigonotylus ruficornis                            4.13
Adelphocoris lineolatus                              0.29     Nabis punctatus punctatus                          0.37
Deraeocoris schach                                   0.04     Ancyrosoma leucogrammes                            0.18
Deraeocoris serenus                                  1.48     Carpocoris fuscispinus                             0.84
Dicyphus globulifer                                  1.83     Dolycoris baccarum                                 0.28
Lopus decolor                                        0.24     Eysarcoris ventralis                               1.03
Lygus pratensis                                      0.29     Nezara viridula                                    0.18
Macrolophus melanotoma                              5.35*     Rhaphigaster nebulosa                              0.28
Macrotylus atricapillus                             13.5*     Staria lunata                                      0.18
Trigonotylus ruficornis                              0.24     Rhynocoris rubricus                                0.09
Nabis pseudoferus pseudoferus                        0.14     Chorosoma schillingi                               0.18
Aelia rostrata                                       0.54     Corizus hyoscyami hyoscyami                        0.28
Ancyrosoma leucogrammes                              0.74     Liorhyssus hyalinus                                0.46
Carpocoris fuscispinus                               0.19     Rophalus subrufus                                  1.40
Dolycoris baccarum                                   1.18     Stictopleurus abutilon                             0.46
Eurydema ventralis                                   0.39     Stictopleurus punctatonervosus                     0.65
Eysarcoris ventralis                                 0.49     Eurygaster maura                                   0.93
Graphosoma lineatum                                  0.09     Odontotarsus robustus                              0.46
Nezara viridula                                      0.29     Tingis grisea                                      0.09
Staria lunata                                        0.74     Kalama tricornis                                   0.18
Captosoma scutellatum                                0.44     * highest values.
Rhynocoris rubricus                                  0.14
Chorosoma schillingi                                 0.19
Corizus hyoscyami hyoscyami                          0.19     number of species (figure 4). The higher number of spe-
Maccevethus spp.                                     0.04     cies was recorded in ecological infrastructures associated
Rhopalus parumpuctatus                               0.34     with extensive and integrated vineyards. In ecological in-
Rhopalus subrufus                                    0.59     frastructures of integrated vineyards eight beneficial spe-
Stictopleurus abutilon                               0.34     cies were found. Among them were as follows: O. niger
Stictopleurus punctatonervosus                       0.39     (15.3%), Deraeocoris serenus (Douglas et Scott) (8.8%)
Eurygaster maura                                     0.59     and Nabis pseudoferus pseudoferus Remane (6.6%)
Odontotarsus robustus                                0.24     dominated in WM, whereas, Geocoris erythrocephalus
Tingis grisea                                        0.14     (Lepeletier et Serville) (5.8%) was more abundant in
* highest values.                                             WFS. The most abundant species associated with ecolog-
                                                              ical infrastructures of the extensive vineyard were
                                                              M. melanotoma (21.8%) and Dicyphus globulifer
Beneficial species                                            (Fallen) (7.4%). Species O. niger (4.8%) and G. ery-
  Results of CA showed that ecological infrastructures        trocephalus (3.42%) occurred with higher number in
affected the abundance of predatory species (figure 3).       WM and WFS. Few individuals of Deraeocoris schach
For each type of ecological infrastructures the number of     (F.) (0.04%) and Rhynocoris rubricus (Germar) (0.4%)
species was calculated. The highest abundance of bene-        were found around this vineyard. Only M. melanotoma
ficial species was associated within the WM and WFS           was considered as a dominant species (16.61%) in the sur-
unlike the MDP. Weedy margin (WM) closer to the ex-           rounding landscape of the organic vineyard with higher
tensive site was highly correlated with beneficials. On the   abundance in WM and WFS, unlike MDP (table 7). All
other hand, the MDP around organic site displayed a low       other species occurred with less than 1%.

70
1
                                                         b
                                           0.9                                                       a
                                                                 ab
                                                                                               ab
                 Simpson Diversity Index   0.8       a
                                           0.7
                                           0.6                                                             b
                                                                                                                      WM
                                           0.5
                                                                                                                      WFS
                                           0.4
                                                                                                                      MDP
                                           0.3
                                           0.2
                                           0.1
                                            0
                                                    Integrated                Extensive              Organic

Figure 1. Simpson Diversity Index. Different letters above the bars indicate significant differences (p < 0.05).

                                           3.5

                                            3
                 Shannon-Wiener Index

                                           2.5
                                                                                                a
                                            2                                                                         WM
                                                                                                     ab
                                                                                                                      WFS
                                           1.5                                                             b
                                                                                                                      MDP
                                            1

                                           0.5

                                            0
                                                    Integrated                Extensive              Organic

Figure 2. Shannon Wiener Diversity Index. Different letters above the bars indicate significant differences (p < 0.05).

Table 6. Sörensen Index of Similarity. Integrated vine-                             nine selected plants. This insect dominated over P. lan-
 yard (I), extensive vineyard (E), organic vineyard (O).                            ceolata (16 individuals), until seven specimens were
                                                                                    recorded on D. carota, and five on H. helix. Only four
Locality                                      I            E            O           specimens were found on D. viscosa. Order Geocoris
I                                             1          0.782        0.683         showed preference on D. carota (19 individuals) and
E                                           0.782          1          0.746         T. pratense (9). Fifteen specimens of R. rubricus oc-
O                                           0.683        0.746          1           cured on A. arvensis and eight on Rubus spp. Other Het-
                                                                                    eroptera collected on these plants were phytophagous.
                                                                                    Among them M. atricapillus (73 individuals) on D. vis-
Plant species associated with true bugs                                             cosa, while on T. pratense 11 individuals of Dicrano-
  A total of 270 individuals were recorded on 9 selected                            cephalus agilis (Scopoli) were found. The highest num-
plants (figure 5). Species M. melanotoma (42 individu-                              ber of N. graminicola graminicola was recorded on
als) was highly associated with D. viscosa. Between                                 Sonchus spp. (29) while 10 individuals were found on
beneficial species, O. niger was found on four out of                               A. arvensis.

                                                                                                                                         71
Figure 3. Correspondence analysis (CA) performed on the abundance of beneficial species associated with different
 ecological infrastructures.

Figure 4. Correspondence analysis (CA) applied to the abundance of beneficial species in ecological infrastructures
 related to the sites of research.

72
Table 7. Percentage composition of predaceous species in ecological infrastructure around integrated, extensive and
 organic vineyards. Weedy margins (WM), wildflower strips (WFS), Mediterranean dry pastures (MDP).
                                                         Integrated                      Extensive                     Organic
Species
                                                  WM         WFS      MDP         WM       WFS     MDP         WM       WFS    MDP
D. globulifer                                       0          0        0         4.44       3       0          0        0       0
D. scach                                            0          0        0         0.04       0       0          0        0       0
D. serenus                                        5.65         3       0.2        0.48       0       0          0        0       0
G. ater                                            0.8        0.6      0.2         0.4      0.6      0          0        0       0
G. erytrocephalus                                  2.2       2.42     1.21         1.4     2.02     0.4         0        0      0.4
G. megacephalus                                     0          0       0.2         0.4      0.6      0          0        0       0
G. pallidipennis pallidipennis                    0.36         0        0           0        0       0          0        0       0
M. melanotoma                                       0          0        0         14.9      6.4     0.4        3.2      5.3    1.21
N. pseudoferus pseudoferus                        3.43       1.81     1.41         0.4      0.2      0          0        0       0
N. punctatus punctatus                              0          0        0           0        0       0          0       0.8      0
O. niger                                           8.4       4.24     2.62        2.02     3.83      1          0       0.6      0
R. rubricus                                        0.4        0.2       0           0       0.4      0          0        0       0

                                     80
               Number of specimens

                                     70                               4

                                     60
                                     50
                                                                                                         T. repens
                                     40                                                                  T. pratense
                                                                      69
                                     30                                                  16              Rubus spp.
                                     20                                      42           5    8
                                                                                          5              P. lanceolata
                                     10                   19                              4
                                          3         11                                         15
                                     0    4   8                 9                  10     7              H. helix
                                                                                                         Euphorbia spp.
                                                                                                         D. viscosa
                                                                                                         D. carota
                                                                                                         A. arvensis

Figure 5. Number of the true bugs occurred on plants.

Discussion                                                                    pests in vineyards, during this research, no damage was
                                                                              observed on the grape. Besides them in ecological infra-
The present study demonstrated the effect of different                        structures, another phytophagous Heteroptera M. atri-
types of ecological infrastructures (WM, WFS and MDP)                         capillus was found as a dominant species around organic
on Heteroptera composition and diversity. According to                        site comprising more than 50% of all capture. One of the
Gessé et al. (2014), Heteroptera composition could be                         key factors that influenced high abundance of M. atri-
specifically related to the plant community in which these                    capillus might be D. viscosa on which this insect was
insects live. Results of our research are in line with the                    found in high numbers. Beneficial M. melanotoma was
findings of other authors (Zurbrüg and Frank, 2006; Gil-                      also associated with D. viscosa. Pollen and nectar of this
bert et al., 2015; Mateos et al., 2018) specifying that flo-                  plant contains high concentration of sugars and therefore
ristic composition and vegetation structure influence Het-                    makes D. viscosa a considerable source of food for natu-
eroptera species assemblage. The majority of true bugs                        ral enemies (Alcalá Herrera et al., 2019). Additionally,
found during this research fed on plants. Among phy-                          D. viscosa is a perennial plant with deeply spread roots
tophagous the most abundant were N. graminicola gram-                         and can survive a long months of drought. Long flower-
inicola and L. pratensis. In this research Nysius mainly                      ing stage, stretched from August to November (Kovačić
occurred on Asteraceae (A. arvensis and Sonchus spp.).                        et al., 2008) makes this plant an appropriate element of
According to Eyes and Malipatil (2010) these insects                          ecological infrastructures (food source, shelter and ovi-
seems to prefer Asteraceae in particular Sonchus. Alt-                        position sites), in dry Mediterranean conditions particu-
hough Arzone et al. (1990) reported Nysius as potential                       larly at the end of the vegetation period. It is interesting

                                                                                                                                       73
to note that within the ecological infrastructures where       sticky fluid from trichomes of Andean blackberry. This
D. viscosa was not present, no specimens of M. melano-         fact might be the reason why in our study R. rubricus was
toma were registered. Another beneficial species O. niger      related to Rubus spp. Gil-Santana and Alves (2011)
belongs to Anthocoridae, that is an important family of        found Zelus versicolor (Herrich-Schaffer) on Asteraceae
natural enemies concerning vineyards (Judt et al., 2019).      known as the plant family that synthetizes a variety of
For instance, Morandin et al. (2011) reported Orius as a       chemical compounds including sterols which may be im-
predator of the Lygus species. Duso and Girolami (1983)        portant for their development. From our results, it is clear
showed Anthocoridae as biological agents controlling           that Reduviidae was associated specifically with WM
Panonychus ulmi (Koch) in vineyards. In addition, Orius        and WFS that contain plants from the family Asteraceae
has been considered as a natural enemy of Colomerus vi-        (for instance A. arvensis). One of the aims of this study
tis (Pagenstecher) (Sáenz-Romo et al., 2019). In our re-       was to select a particular species of spontaneous flora to
search, Orius was observed in WM and WFS, therefore            be the habitat for feeding or a reproduction site for natural
these elements of ecological infrastructures might serve       enemies. The families that dominated in WM and WFS
as a suitable habitat for these insects. Atakan and Pelivan    were Asteraceae, Apiaceae and Fabaceae (complex plant
(2019) reported Vicia villosa as a bank plant for some         architecture, compound flower structure, high pollen pro-
Orius species. Elimem et al. (2018) confirmed Chrysan-         ducers). Few works (Fauvel, 1999; Morris, 2000; Haddad
themum coronarium as a host plants on which several            et al., 2001) emphasized the impact of richly structured
species of Orius were found. For instance, Honěk et al.        habitats (denser and higher vegetation, high pollen pro-
(2013) reported the Taraxacum officinale was frequently        ducers) as well as plant species with attractive flowers on
colonized by Anthocoridae. According to Pelivan and            beneficial insects. Both WFS and WM showed greater
Atakan (2019) Orius was recorded on Sinapis arvensis.          abundance of predatory Heteroptera as well as a higher
Species from the families Asteraceae, Apiaceae, Faba-          number of species compared to MDP. Moreover, higher
ceae seem to be most appropriate hosts for natural ene-        biodiversity indices were related to WM and WFS where
mies, especially the genus Orius and Nabis (Limonta et         Dicotyledonae prevailed. The number of plant species in
al., 2003; Altieri et al., 2005). For instance, a high abun-   MDP was also lower than in WM and WFS. A lower
dance of, M. melanotoma was related to D. viscosa. On          number of the Heteroptera species within MDP in our
the other hand, G. erytrocephalus was found on D. carota       case can be associated with lower diversity of plants and
as well as O. niger. This Anthocoridae was also associ-        the higher disturbance by livestock grazing. Therefore,
ated with P. lanceolata. However, we assume that the           due to the fact that non-crop habitats provide food, prey,
reason of the appearance of a higher population of O. ni-      and refuge and harboured a number of beneficials, pres-
ger in the present study might also be the proximity of        ence of such plants in or around the vineyards could in-
peach and apple orchards in integrated site bordering          crease the occurrence of natural enemies (Judt et al.,
with WM as well as natural hedges (Atanassov et al.,           2019). Unlike crop or vegetable production, weeds are
2003; Morandin et al., 2011; Wan et al., 2011). Further-       not a considerable problem within vineyards particularly
more, within WM several host plants which attract aphids       in the Mediterranean region. Moreover, weeds show
(Rumex spp., P. lanceolata and D. carota) were found.          some kind of synchronicity in flowering and are present
According to Wang et al. (2014), Orius has been rec-           in vineyards during the whole vegetation season. How-
orded as an efficient predator of numerous aphid species.      ever, our results suggest that WM and WFS may contrib-
It has been widely known that a large group of arthropods      ute to the conservation of the true bugs biodiversity
are attracted by extrafloral nectaries (Guillermo-Ferreira     within and around vineyards. In regards to WFS special
et al., 2012; Portillo et al., 2012; Stefani et al., 2019).    emphasis should be placed on perennial plants. Flower
Extrafloral nectar seems to indicate the presence of prey      rich boundaries seems to be important for beneficial spe-
on the plants and attract predators (Jones et al., 2016;       cies that depend on pollen or nectar and in that sense, cre-
Stefani et al., 2019). Nectar-rich flowers of particular       ating and maintaining ecological infrastructures as the
weed species are known to promote survival and fecun-          part of landscape should be taken into account when
dity of natural enemies (Herz et al., 2019). A large num-      planning a conservation biological control program. In
ber of studies reported the effects of nectar and pollen on    general, the heteropteran community structure depends
beneficial insects fitness (Lundgreen, 2011; Portillo et       on various factors as well as on the abundance of plants,
al., 2012), but on the other hand very little is known about   their structure, richness and diversity (Gilbert et al.,
the effects of plant-derived sugars on predatory Heterop-      2015). Furthermore, our results agreed with Froidevaux
tera in general. For instance, pollen enhances fecundity       et al. (2017) that landscape characteristics (ecological in-
of Macrolophus pygmaeus (Rambur) (Vandekerkhove                frastructures) are more important for insect composition
and De Clercq, 2010). Revel et al. (2010) frequently ob-       than exclusively vineyard management. These areas
served Zelus annulosus (Stal) (Reduviidae) on plants in        might serve as a source of predators and ensure their mi-
search for extrafloral nectar. Some Reduviids collect nec-     grations from surrounding landscape into the vineyard.
tar and honeydew from certain plants in order to coat          For instance, Macrolophus and Dyciphus can colonize
their legs with sticky substances facilitating prey capture    crop plants from the semi-natural habitats (Aviron et al.,
(Revel et al., 2010). According to Guillermo-Ferreira et       2016). The influence of landscape effects on the possibil-
al. (2012), the diet of Atopozelus opsimus Elkins (Redu-       ity of natural enemies to migrate from ecological infra-
viidae) both instars and adults consisted mostly of extra-     structures into agricultural areas depends on taxon-spe-
floral nectar. Besides that, Avila-Núñez et al. (2016)         cific mobility and dispersal capacity (Rusch et al., 2011).
found reduvid Heniartes stali Wygodzinsky collecting           Therefore, beneficial insects could be filtered out from

74
the ecological infrastructures into the vineyard due to          ALTIERI M. A., PONTI L., NICHOLLS C. I., 2005.- Manipulating
their colonization potential. True bugs show great flight         vineyard biodiversity for improved insect pest management:
potential, thus can be able to exceed long distances (Lu          case studies from northern California.- International Journal
et al., 2007, Fu et al., 2014). However, surrounding land-        of Biodiversity Science and Management, 1: 1-13.
                                                                 ARZONE A., VIDANO C., ALMA A., 1990.- Vineyard agro-eco-
scape of vineyards including weedy margins and peren-             system Heteroptera in the Mediterranean Region.- Scopolia,
nial wildflower strips seems to be an appropriate habitat         1: 101-107.
for beneficial Heteroptera, so their presence in ecological      ATAKAN E., PEHLIVAN S., 2020.- Influence of weed management
infrastructures contribute to the insect composition and          on the abundance of thrips species (Thysanoptera) and the
diversity.                                                        predatory bug, Orius niger (Hemiptera: Anthocoridae) in cit-
                                                                  rus mandarin.- Applied Entomology and Zoology, 55: 71-81.
                                                                 ATANASSOV A., SHEARER P. W., HAMILTON G. C., 2003.- Peach
                                                                  pest management programs impact beneficial fauna abun-
Conclusions                                                       dance and Grapholita molesta (Lepidoptera: Tortricidae) egg
                                                                  parasitism and predation.- Environmental Entomology, 32
Our results correspond with earlier studies that empha-           (4): 780-788.
sized the influence of ecological infrastructures on Het-        ATTWOOD S. J., MARON M., HOUSE A. P. N., ZAMMIT C., 2008.-
eroptera assemblage and diversity. In this study, Heter-          Do arthropod assemblages display globally consistent re-
optera biodiversity reached a higher level in weedy bor-          sponse to intensified agricultural land use and management?-
ders and wildflower strips, unlike Mediterranean dry pas-         Global Ecology and Biogeography, 17 (5): 585-599.
tures. Although weed cover and wildflower strips can             AVILA-NÚÑEZ J. L., NAYA M., OTERO L. D., ALONSO AMELOT
                                                                  M. E., 2016.- A resin bugs (Reduviidae: Harpactorinae: Api-
harbour a lot of phytophagous, these bugs usually serve           omerini) harvesting the trichome secretion from an Andean
as food not only for beneficial Heteroptera but for other         blackberry.- Neotropical Biodiversity, 2 (1): 151-158.
groups of predatory insects, parasites as well as for spi-       AVIRON S., POGGI S., VARENNES Y. D., LEFÈVRE D., 2016.- Lo-
ders. These findings highlight the importance of conserv-         cal landscape heterogeneity affects crop colonization by nat-
ing spontaneous flora in vineyard surrounding landscape           ural enemies of pests in protected horticultural cropping sys-
to improve better conditions for true bugs. Results of this       tems.- Agriculture Ecosystems and Environment, 227: 1-10.
research suggest that vineyard adjacent areas such as            BEGG G. S., COOK S. M., DYE R., FERRANTE M., FRANCK P.,
wildflower strips, and in particular weedy margins con-           LAVIGNE C., LÖVEI G. L., MANSION-VAQUIE A., PELL J. K.,
tribute to promoting agrobiodiversity. Future research            PETIT S., QUESADA N., RICCI B., WRATTEN S. D., BIRCH A.
                                                                  N. E., 2017.- A functional overview of conservation biologi-
should be devoted to systematically exploring the role of         cal control.- Crop Protection, 97: 145-158.
spontaneous plants on the beneficial Heteroptera commu-          BOLLE H. J., 2003.- Mediterranean climate - variability and
nity. Special attention should be given to plants such as         trends.- Springer-Verlag, Berlin Heidelberg, Germany.
A. arvensis, D. carota, D. viscosa, P. lanceolata and            CHUCHE J., THIÉRY D., 2014.- Biology and ecology of the fla-
Rubus spp., which could act as good candidates in attract-        vescence dorée vector Scaphoideus titanus: a review.- Agron-
ing the predatory species. Furthermore, it could be inter-        omy for Sustainable Development, 34: 381-403.
esting to identify which phenophases of non-crop plants          COSTELLO M. J., DAANE K. M., 1999.- Abundance of spiders
support higher numbers of predators. That data might              and insects predators on grapes in central California.- Journal
help in preventing this vegetation from being mowed or            of Arachnology, 27: 531-538.
                                                                 DERJANSCHI V., PERICART J., 2006.- Hémiptères Pentatomoi-
destroyed in particular phenophases. Finally, this re-            dea Euro-Méditerranéens. Volume I. Faune de France.-
search could help with the better understanding of the            Fédération Française des Sociétés de Sciences Naturelles,
role of ecological infrastructures as a valuable conserva-        Paris, France.
tion measure in IPM.                                             DUSO C., GIROLAMI V., 1983.- Ruolo degli Antocoridi nel con-
                                                                  trollo del Panonychus ulmi Koch nei vigneti.- Bollettino
                                                                  dell'Istituto di Entomologia della Università degli Studi di
                                                                  Bologna, 37: 157-169.
Acknowledgements                                                 ELIMEM M., LIMEM-SELLEMI E., HAFSI A., BEN OTHMEN S.,
                                                                  CHERMITI B., 2018.- The genus Orius Wolf (Insecta; Heter-
We would like to thank Andrej Gogala from Slovenian               optera; Anthocoridae) in the Tunisian coastal region: bio-
Museum of National History, Ljubljana for help in Hete-           diveristy and distribution.- Journal of New Sciences, Sustain-
roptera identification. We are also grateful to the farmers       able Livestock Management, 5 (2): 91-99.
for allowing us to survey their vineyards. Finally, we owe       EYES A. C., MALIPATIL M. B., 2010.- Nysius caledoniae Dis-
our deep thanks to anonymous reviewers for their valua-           tant, 1920 (Hemiptera: Heteroptera: Orsillidae) a recent intro-
ble comments and suggestions on the manuscript.                   duction into New Zealand, and keys to the species Nysius, and
                                                                  genera of Orsillidae in New Zealand.- Zootaxa, 2484: 45-52.
                                                                 FAUVEL G., 1999.- Diversity of Heteroptera in agroecosystems:
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Appendix
Braun-Blanquet cover abundance in ecological infrastructures associated with organic, extensive and integrated vine-
 yard. Weedy margins (WM), wildflower strips (WFS), Mediterranean dry pastures (MDP).
                                                     Integrated vineyard
            Weedy margins                             Wildflower strips                    Mediterranean dry pastures
                (WM)                                       (WFS)                                     (MDP)
 1.1 Avena sterilis L.                      +.1 Cynodon dactylon L.                   2.2 Daucus carota L.
 +.1 Dactylis glomerata L. subsp.           1.2 Foeniculum vulgare L.                 +.1 Rumex spp.
     hispanica (Roth.) Nyman                2.2 Daucus carota L.                      1.2 Cynodon dactylon L.
 +.1 Cirsium arvense L.                     1.1 Dactylis glomerata L. subsp.          1.2. Bromus racemosus L.
 +.1 Euphorbia spp.                              hispanica (Roth.) Nyman              +.1 Erigeron annus L.
 1.1 Bromus racemosus L.                    +.1 Achillea millefolium L.               +.1 Convolvulus arvensis L.
 +.2 Dorycnium hirsutum (L.) Ser.           1.2 Trifolium repens L.                   1.1 Setaria viridis (L.) Beauv
 +.1 Cichorium intybus L                    r.1 Euphorbia spp.
 1.1 Daucus carota L.                       +.1 Convolvulus arvensis L.
 +.1 Vicia spp.                             +.1 Artemisia absinthium L.
 1.2 Trifolium repens L.                    +.1 Avena sterilis L.
 +.2 Trifolium pratense L.                  +.1 Cirsium arvense L.
 1.1 Plantago lanceolata L.
 +.1 Capsella bursa pastoris (L.)
     Medik
 +.1 Sonchus spp.
 +.1 Lothus spp.
 +.1 Centaurea cyanus L.
 +.1 Rumex spp.
 +.2 Anthemis arvensis L.
 +.1 Convolvulus arvensis L.
                                                                                                           Appendix continued

                                                                                                                               77
Appendix continued
                                                 Extensive vineyard
            Weedy margins                         Wildflower strips                 Mediterranean dry pastures
                 (WM)                                  (WFS)                                  (MDP)
 2.2 Anthemis arvensis L.               1.1 Avena sterilis L.                  2.1 Avena sterilis L.
 1.2 Cynodon dactylon L.                1.1 Bromus racemosus L.                 1.2 Dactylis glomerata L. subsp.
 1.1 Avena sterilis L.                  1.1 Hordeum murinum L.                      hispanica (Roth.) Nyman
 1.1 Sorghum bicolor (L.) Moench        +.1 Galium spp.                        1.1 Daucus carota L.
 +.1 Amaranthus retroflexus L.          +.1 Lotus cornicolatus L.              1.1 Dittrichia viscosa (L.) Greuter
 +.2 Bromus racemosus L.                1.1 Daucus carota L.                   1.1 Doricnium hirsutum (L.) Ser.
 +.2 Chenopodium album L.               1.1 Dactylis glomerata L. subsp.       1.1 Hordeum murinum L.
 +.1 Mercurialis annua L.                    hispanica (Roth.) Nyman           1.1 Vicia spp.
 +.1 Cichorium intybus L.               1.1 Vicia spp.                         +.1 Lotus corniculatus L.
 +.1 Hordeum murinum L.                 1.2 Dittrichia viscosa (L.) Greuter    +.1 Foeniculum vulgare L.
 +.1 Papaver rhoeas L.                  +.1 Securidera spp.
 +.1 Sonchus spp.                       +.1 Setaria viridis (L.) P. Beauv.
 +.1 Artemisia absinthium L.            +.1 Dorycnium hirsutum (L.) Ser.
 +.1Fumaria officinalis L.              +.1 Onopordum illyricum L.
 +.1 Senecio vulgaris L.                +.1 Sisymbrium officinale (L.) Scop.
 +.1 Convolvulus arvensis L.
 +.1 Lamium amplexicaule L.
 +.1 Foeniculum vulgare L.
 +.1 Dactylis glomerata L. subsp.
       hispanica (Roth.) Nyman
 +.1 Setaria viridis (L.) Beauv.
 +.1 Bunias erucago L.
 +.1 Calendula arvensis L.
 +.1 Cirsium arvense L.
 r.1 Allium spp.
 r.1 Melilotus officinalis (L.) Lam.
 +.1 Portulaca oleracea L.
                                                  Organic vineyard
            Weedy margins                         Wildflower strips                Mediterranean dry pastures
                 (WM)                                  (WFS)                                  (MDP)
 3.2 Cynodon dactylon (L.) Pers.        1.1 Dittrichia viscosa (L.) Greuter    1.1 Aegilops neglecta Req. ex.
 2.2 Dorycnium hirsutum (L.) Ser.       +.1 Aegilops neglecta Req. ex Bertol        Bertol.
 1.1 Dittrichia viscosa (L.) Greuter    +.1 Daucus carota L.                   1.1 Avena sterilis L.
 +.1 Centaurea cyanus L.                +.1 Avena sterilis L.                  +.1 Dittrichia viscosa (L.) Greuter
 +.2 Aegilops neglecta Req. ex Bertol   2.1 Briza maxima L.                    +.1 Hypericum perforatum (L.) Lam.
 1.1 Daucus carota L.                   +.1 Vicia spp.                         +.1 Convolvulus arvensis L.
 +.1 Avena fatua L.                     +.1 Hordeum murinum L.                 +.1 Cichorium intybus L.
 +.1 Briza maxima L.                    +.1 Cichorium intybus L.               2.1 Daucus carota L.
 +.1 Vicia spp.                         +.1 Scolymus hispanicus L.             1.1 Vicia spp.
 +.1 Hordeum murinum L.                 2.2 Dorycnium hirsutum (L.) Ser.       1.1 Rumex spp.
 +.1 Cichorium intybus L.               +.1 Chrysopogon gryllus (L.) Trin.     1.2 Trifolium repens L.
 +.1 Scolymus hispanicus L.             +.1 Sonchus spp.                       1.2 Koeleria spp.
 r.1 Datura stramonium L.               +.1 Dactylis glomerata L. subsp.
 +.1 Chrysopogon gryllus (L.) Trin.          hispanica (Roth.) Nyman
 +.1 Sonchus spp.                       1.1 Trifolium repens L.
 +.1 Rumex spp.
 +.1 Convolvulus arvensis L.
 +.2 Lotus spp.
 +.1 Onopordum illyricum L.

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