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  1. Article: Oviposition behavior of the mirid Macrolophus pygmaeus under risk of intraguild predation and cannibalism

    Dumont, François / Lucas, Éric / Alomar, Oscar

    Insect science. 2021 Feb., v. 28, no. 1

    2021  

    Abstract: Zoophytophagous mirid species, that feed and develop either on prey or plant resources, are often found simultaneously on the same host. Hence, these species can engage in both intraguild predation and cannibalism, which can pose a threat to mirid eggs. ... ...

    Abstract Zoophytophagous mirid species, that feed and develop either on prey or plant resources, are often found simultaneously on the same host. Hence, these species can engage in both intraguild predation and cannibalism, which can pose a threat to mirid eggs. Ovipositing females may respond to such risks of predation on their eggs by reducing the number of eggs laid or selecting safer oviposition sites. We tested the oviposition behavior of Macrolophus pygmaeus (Rambur) (Hemiptera: Miridae) females under the risk of cannibalism by M. pygmaeus males and intraguild predation by Nesidiocoris tenuis (Reuter) males (Hemiptera: Miridae) under laboratory conditions. Intraguild predators and cannibals were introduced during or after the oviposition period. The number of eggs laid (using counts of newly hatched nymphs) and their proportion on each part of a tomato plant were both measured. The results reveal that only cannibalism by M. pygmaeus males after the period of oviposition significantly decreased the number of hatched eggs. Cannibalism thus represents a greater risk to mirid eggs than intraguild predation. The M. pygmaeus female responded to the presence of potential intraguild predators (or competitors) by decreasing the number of eggs laid in the upper leaves. The results suggest that M. pygmaeus females avoid competition by N. tenuis, by laying fewer eggs on upper leaves. Cannibalism could regulate zoophytophagous predator populations under prey scarcity conditions and minimize the risk of crop damage associated with those biological control agents.
    Keywords Macrolophus ; Nesidiocoris tenuis ; biological control agents ; cannibalism ; crop damage ; eggs ; females ; insects ; laboratory experimentation ; leaves ; males ; nymphs ; oviposition ; oviposition sites ; population ; predation ; predators ; risk ; tomatoes
    Language English
    Dates of publication 2021-02
    Size p. 224-230.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note NAL-light ; JOURNAL ARTICLE
    ZDB-ID 2179775-4
    ISSN 1744-7917 ; 1672-9609
    ISSN (online) 1744-7917
    ISSN 1672-9609
    DOI 10.1111/1744-7917.12752
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Molecular tracking of insect dispersal to verify arthropod predator movement from an alfalfa field to a peach orchard

    Batuecas, Iván / Agustí, Nuria / Castañé, Cristina / Alomar, Oscar

    Biological control. 2021 July, v. 158

    2021  

    Abstract: Implementation of landscape approaches to conservation biological control programs requires the confirmation of putative sources that contribute to predator colonization of crops. This study aims to confirm predator dispersal from an alfalfa field to a ... ...

    Abstract Implementation of landscape approaches to conservation biological control programs requires the confirmation of putative sources that contribute to predator colonization of crops. This study aims to confirm predator dispersal from an alfalfa field to a neighboring peach orchard with a DNA mark-capture procedure based on a topical application of a solution of grinded brine shrimp cysts, Artemia spp. (Anostraca: Artemiidae), followed by a conventional PCR.To optimize the marking procedure, a well-known predator present in orchards as well as in arable crops, Orius laevigatus (Fieber) (Hemiptera: Anthocoridae), was used as a model in this study. In greenhouse trials, the acquisition and the retention time of the Artemia markings were determined, either directly by spraying them with the Artemia solution or indirectly via residual contact on caged plants after the spray. The topical mark remained detectable on O. laevigatus after 6 days, and 50% of the tested predators were positive 3 days after walking on the sprayed plants.After that, a 25m² strip of an alfalfa crop neighboring to a peach orchard was sprayed with the Artemia solution just after the alfalfa cuts, and several common predator species were collected using sticky traps placed between both crops. After PCR analysis with the Artemia specific primers, 32% of the analyzed predators (coccinellids, anthocorids, chrysopids, and mirids) showed the mark. The results of this study confirm the usefulness of this marking method to monitor dispersal of biological control agents between neighboring crops, in this case alfalfa and peach.
    Keywords Artemia ; Chrysopidae ; Coccinellidae ; DNA ; Orius laevigatus ; alfalfa ; arthropods ; biological control ; greenhouses ; insects ; landscapes ; models ; orchards ; peaches ; polymerase chain reaction ; topical application
    Language English
    Dates of publication 2021-07
    Publishing place Elsevier Inc.
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 1149971-0
    ISSN 1049-9644
    ISSN 1049-9644
    DOI 10.1016/j.biocontrol.2020.104506
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: Control of

    Castañé, Cristina / Alomar, Oscar / Rocha, Alfred / Vila, Enric / Riudavets, Jordi

    Insects

    2022  Volume 13, Issue 12

    Abstract: In this study, the predatory ... ...

    Abstract In this study, the predatory mite
    Language English
    Publishing date 2022-12-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662247-6
    ISSN 2075-4450
    ISSN 2075-4450
    DOI 10.3390/insects13121116
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Land use alters the abundance of herbivore and predatory insects on crops: the case of alfalfa

    Madeira, Filipe / Clemente-Orta, Gemma / Alomar, Oscar / Batuecas, Ivan / Sossai, Samuel / Albajes, Ramon

    Journal of pest science. 2022 Jan., v. 95, no. 1

    2022  

    Abstract: We assess the effects of changing land use and crop management on alfalfa insect abundance by comparing it in 50 alfalfa fields when they were inserted in landscapes with different proportions of arable crops and orchards. Land use in a buffer of 500 m ... ...

    Abstract We assess the effects of changing land use and crop management on alfalfa insect abundance by comparing it in 50 alfalfa fields when they were inserted in landscapes with different proportions of arable crops and orchards. Land use in a buffer of 500 m was assessed, and alfalfa insect abundance was estimated with sticky yellow traps. The number of catches of several herbivores and predators was related to the proportion of landscape components and several field variables. Results indicated that the proportion of orchards in the buffer negatively affected the abundance of predators on alfalfa, likely because orchards treated with pesticides are a sink for predators moving in the landscape, among other possible causes. Other landscape variables such as noncrop habitats, winter cereals, and landscape diversity analysed by the Shannon index had a minor influence. Among field variables, field size influenced positively the abundance of insects on alfalfa, whereas alfalfa growth stage and age affected positively or negatively the different herbivores and predators. Of course, abundance of predators and prey was affected by the abundance of prey and predators, respectively. These findings suggest that a high proportion of intensively managed crops (orchards) in the landscape interferes with the role of alfalfa as a reservoir of predatory insects for adjacent crops and that the responses to local and landscape structures are temporal and species-specific as previously concluded for maize. Consequently, landscape and field management strategies to improve pest control must consider both types of variables as well as their changing influence when we modify them.
    Keywords alfalfa ; corn ; crop management ; developmental stages ; herbivores ; land use ; landscapes ; pest control ; pests
    Language English
    Dates of publication 2022-01
    Size p. 473-491.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 2141662-X
    ISSN 1612-4766 ; 1439-0280 ; 1612-4758
    ISSN (online) 1612-4766 ; 1439-0280
    ISSN 1612-4758
    DOI 10.1007/s10340-021-01395-y
    Database NAL-Catalogue (AGRICOLA)

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  5. Article: Disentangling arthropod and plant resources consumed by Orius spp. in peach and alfalfa crops by metagenomic analysis

    Batuecas, Iván / Alomar, Oscar / Castañé, Cristina / Piñol, Josep / Gallardo-Montoya, Lorena / Agustí, Nuria

    Journal of pest science. 2022 Sept., v. 95, no. 4

    2022  

    Abstract: Agricultural intensification is affecting the biological control of insect pests, an important component for sustainable crop production. To understand the changing patterns of insect abundance within an agroecosystem, it is necessary to disentangle the ... ...

    Abstract Agricultural intensification is affecting the biological control of insect pests, an important component for sustainable crop production. To understand the changing patterns of insect abundance within an agroecosystem, it is necessary to disentangle the trophic interactions between species, and metabarcoding is an excellent alternative to show them. In the Ebro Basin (NE Iberian Peninsula), agricultural landscapes are composed of a mosaic of crops scattered with natural and semi-natural habitats, where the presence of Orius spp., used as biocontrol agents, is well known. To shed light on their predatory role in this area, a previously developed metabarcoding multi-primer method has been used to study the arthropod and plant most frequently resources consumed by some field-collected Orius, sampled at different dates in a peach and an alfalfa adjacent crop. Their high-throughput sequencing (HTS) analysis showed the consumption of 15 arthropod and 12 plant taxa. Eight of them were consumed by O. laevigatus, six by O. majusculus and 23 by O. niger. The obtained results showed that HTS is a powerful tool in studies of trophic interactions in agroecosystems. Among the detected arthropods, other natural enemies were present, showing a certain degree of intraguild predation, which has been demonstrated by developing a new added strategy in the bioinformatic analysis. Detected plant consumption indicates that Orius forages on several plant species, showing their movement from them to the sampled crops. These plants could have a potential role in attracting or maintaining these predators in both crops in biological control strategies.
    Keywords DNA barcoding ; Orius ; agroecosystems ; alfalfa ; arthropods ; basins ; bioinformatics ; biological insect control ; insects ; intensive farming ; metagenomics ; peaches ; pests ; predation ; sustainable agriculture ; Iberian Peninsula
    Language English
    Dates of publication 2022-09
    Size p. 1543-1556.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 2141662-X
    ISSN 1612-4766 ; 1439-0280 ; 1612-4758
    ISSN (online) 1612-4766 ; 1439-0280
    ISSN 1612-4758
    DOI 10.1007/s10340-022-01554-9
    Database NAL-Catalogue (AGRICOLA)

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  6. Article: Development of a PCR‐based method to monitor arthropod dispersal in agroecosystems: Macrolophus pygmaeus (Hemiptera: Miridae) from banker plants to tomato crops

    Agustí, Nuria / Castañé, Cristina / Fraile, Irene / Alomar, Oscar

    Insect science. 2020 Oct., v. 27, no. 5

    2020  

    Abstract: Development of conservation biological control programs requires the identification of sources that contribute to predator colonization of crops. Macrolophus pygmaeus (Rambur) (Hemiptera: Miridae) is an efficient polyphagous predator used in biological ... ...

    Abstract Development of conservation biological control programs requires the identification of sources that contribute to predator colonization of crops. Macrolophus pygmaeus (Rambur) (Hemiptera: Miridae) is an efficient polyphagous predator used in biological control programs in vegetable crops in Europe. We have developed a marking method based on spraying with a solution of the brine shrimp Artemia spp. (Anostraca: Artemiidae) cysts, followed by a PCR detection of Artemia DNA to monitor M. pygmaeus dispersal from banker plants to tomato crops. Experiments conducted in climatic chambers show that the topical application of this marking solution on M. pygmaeus does not significantly reduce adult longevity and that it is detected up to 6 d after the application. When this Artemia solution was applied on Calendula officinalis L. banker plants harboring M. pygmaeus and maintained outdoors, Artemia DNA was still detected on 62% of the insects after 6 d. The conducted field applications in commercial greenhouses have confirmed the usefulness of this method to monitor M. pygmaeus dispersal from banker plants to a newly planted tomato crop. This method can be used to assess arthropod movement, being an interesting molecular approach for further improving future pest management strategies.
    Keywords Artemia ; Calendula officinalis ; DNA ; Macrolophus ; adults ; agroecosystems ; arthropods ; biological control ; detection ; greenhouses ; insects ; longevity ; pest management ; polymerase chain reaction ; spraying ; tomatoes ; topical application ; vegetable crops ; Europe
    Language English
    Dates of publication 2020-10
    Size p. 1125-1134.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note NAL-light ; JOURNAL ARTICLE
    ZDB-ID 2179775-4
    ISSN 1744-7917 ; 1672-9609
    ISSN (online) 1744-7917
    ISSN 1672-9609
    DOI 10.1111/1744-7917.12717
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Oviposition behavior of the mirid Macrolophus pygmaeus under risk of intraguild predation and cannibalism.

    Dumont, François / Lucas, Éric / Alomar, Oscar

    Insect science

    2020  Volume 28, Issue 1, Page(s) 224–230

    Abstract: Zoophytophagous mirid species, that feed and develop either on prey or plant resources, are often found simultaneously on the same host. Hence, these species can engage in both intraguild predation and cannibalism, which can pose a threat to mirid eggs. ... ...

    Abstract Zoophytophagous mirid species, that feed and develop either on prey or plant resources, are often found simultaneously on the same host. Hence, these species can engage in both intraguild predation and cannibalism, which can pose a threat to mirid eggs. Ovipositing females may respond to such risks of predation on their eggs by reducing the number of eggs laid or selecting safer oviposition sites. We tested the oviposition behavior of Macrolophus pygmaeus (Rambur) (Hemiptera: Miridae) females under the risk of cannibalism by M. pygmaeus males and intraguild predation by Nesidiocoris tenuis (Reuter) males (Hemiptera: Miridae) under laboratory conditions. Intraguild predators and cannibals were introduced during or after the oviposition period. The number of eggs laid (using counts of newly hatched nymphs) and their proportion on each part of a tomato plant were both measured. The results reveal that only cannibalism by M. pygmaeus males after the period of oviposition significantly decreased the number of hatched eggs. Cannibalism thus represents a greater risk to mirid eggs than intraguild predation. The M. pygmaeus female responded to the presence of potential intraguild predators (or competitors) by decreasing the number of eggs laid in the upper leaves. The results suggest that M. pygmaeus females avoid competition by N. tenuis, by laying fewer eggs on upper leaves. Cannibalism could regulate zoophytophagous predator populations under prey scarcity conditions and minimize the risk of crop damage associated with those biological control agents.
    MeSH term(s) Animals ; Cannibalism ; Female ; Heteroptera/physiology ; Male ; Oviposition ; Predatory Behavior
    Language English
    Publishing date 2020-05-08
    Publishing country Australia
    Document type Journal Article
    ZDB-ID 2179775-4
    ISSN 1744-7917 ; 1672-9609
    ISSN (online) 1744-7917
    ISSN 1672-9609
    DOI 10.1111/1744-7917.12752
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Development of a multiprimer metabarcoding approach to understanding trophic interactions in agroecosystems

    Batuecas, Ivan / Alomar, Oscar / Castañe, Cristina / Piñol, Josep / Boyer, Stéphane / Gallardo‐Montoya, Lorena / Agustí, Nuria

    Insect science. 2022 Aug., v. 29, no. 4

    2022  

    Abstract: To understand trophic interactions and the precise ecological role of each predatory species, it is important to know which arthropod and plant resources are used by generalist predators in agroecosystems. Molecular approaches, such as the use of high‐ ... ...

    Abstract To understand trophic interactions and the precise ecological role of each predatory species, it is important to know which arthropod and plant resources are used by generalist predators in agroecosystems. Molecular approaches, such as the use of high‐throughput sequencing (HTS), play a key role in identifying these resources. This study develops a multiprimer metabarcoding approach for screening the most common trophic interactions of two predatory arthropods with contrasting morphologies, Rhagonycha fulva (Coleoptera: Cantharidae) and Anthocoris nemoralis (Hemiptera: Anthocoridae) collected from a peach crop. To reduce the time and cost of this metabarcoding approach, we first evaluated the effect of using two different predator‐pools of different size (10 and 23 individuals of the same species). We also used our system to analyze the performance of one and two primer pairs in the same library. Our results show that the analysis of 23 individuals together with the use of two primer pairs in the same library optimize the HTS analysis. Using these best‐performing conditions, we then analyzed the entire bodies of field‐collected predators as well as the washing solutions used to clean the insect bodies. We were able to identify both gut content (i.e., diet) and external pollen load (i.e., on the insects’ bodies). This study also demonstrates the importance of washing predatory insects’ bodies prior to HTS analysis when the target species have a considerable size (>10 mm) and hairy structures. This metabarcoding approach has significant potential for the study of trophic links in agriculture, revealing expected and unexpected trophic relationships.
    Keywords Anthocoris nemoralis ; Cantharidae ; DNA barcoding ; agroecosystems ; diet ; digestive system ; peaches ; pollen loads
    Language English
    Dates of publication 2022-08
    Size p. 1195-1210.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 2179775-4
    ISSN 1744-7917 ; 1672-9609
    ISSN (online) 1744-7917
    ISSN 1672-9609
    DOI 10.1111/1744-7917.12992
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: Banker plants and landscape composition influence colonisation precocity of tomato greenhouses by mirid predators

    Ardanuy, Agnès / Figueras, Martí / Matas, Montserrat / Arnó, Judit / Agustí, Nuria / Alomar, Òscar / Albajes, Ramon / Gabarra, Rosa

    Journal of pest science. 2022 Jan., v. 95, no. 1

    2022  

    Abstract: Conservation biological control involves manipulation of the environment to enhance the effectiveness of natural enemies in controlling crop pests. In this study, we combined historical data, sticky trap sampling of tomato greenhouses and beat sampling ... ...

    Abstract Conservation biological control involves manipulation of the environment to enhance the effectiveness of natural enemies in controlling crop pests. In this study, we combined historical data, sticky trap sampling of tomato greenhouses and beat sampling of adjacent vegetation to identify which greenhouse characteristics, habitat management practices and landscape features favour an early colonisation of tomato greenhouses by the key mirid predator Macrolophus pygmaeus and its establishment in NE Spain. Results show that landscape composition and the use of Calendula officinalis banker plants inside the greenhouse are key factors. In general, greater amounts of herbaceous semi-natural cover at the landscape scale promoted M. pygmaeus colonisation, while the use of C. officinalis banker plants encouraged M. pygmaeus colonisation independently of the landscape context. We identified host plants adjacent to tomato greenhouses that sustain M. pygmaeus populations; however, they did not have a major effect on M. pygmaeus colonisation compared to larger landscape and banker plant effects. Early colonisation of greenhouses by this predator species also translated into lower accumulated incidence of pests at the end of the sampling period. This study demonstrates the importance of active habitat management practices in promoting the early arrival of M. pygmaeus in greenhouses with delayed spontaneous colonisation.
    Keywords Calendula officinalis ; Macrolophus pygmaeus ; biological control ; early development ; greenhouses ; habitat conservation ; landscapes ; sticky traps ; tomatoes ; vegetation ; Spain
    Language English
    Dates of publication 2022-01
    Size p. 447-459.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 2141662-X
    ISSN 1612-4766 ; 1439-0280 ; 1612-4758
    ISSN (online) 1612-4766 ; 1439-0280
    ISSN 1612-4758
    DOI 10.1007/s10340-021-01387-y
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Development of a PCR-based method to monitor arthropod dispersal in agroecosystems: Macrolophus pygmaeus (Hemiptera: Miridae) from banker plants to tomato crops.

    Agustí, Nuria / Castañé, Cristina / Fraile, Irene / Alomar, Oscar

    Insect science

    2019  Volume 27, Issue 5, Page(s) 1125–1134

    Abstract: Development of conservation biological control programs requires the identification of sources that contribute to predator colonization of crops. Macrolophus pygmaeus (Rambur) (Hemiptera: Miridae) is an efficient polyphagous predator used in biological ... ...

    Abstract Development of conservation biological control programs requires the identification of sources that contribute to predator colonization of crops. Macrolophus pygmaeus (Rambur) (Hemiptera: Miridae) is an efficient polyphagous predator used in biological control programs in vegetable crops in Europe. We have developed a marking method based on spraying with a solution of the brine shrimp Artemia spp. (Anostraca: Artemiidae) cysts, followed by a PCR detection of Artemia DNA to monitor M. pygmaeus dispersal from banker plants to tomato crops. Experiments conducted in climatic chambers show that the topical application of this marking solution on M. pygmaeus does not significantly reduce adult longevity and that it is detected up to 6 d after the application. When this Artemia solution was applied on Calendula officinalis L. banker plants harboring M. pygmaeus and maintained outdoors, Artemia DNA was still detected on 62% of the insects after 6 d. The conducted field applications in commercial greenhouses have confirmed the usefulness of this method to monitor M. pygmaeus dispersal from banker plants to a newly planted tomato crop. This method can be used to assess arthropod movement, being an interesting molecular approach for further improving future pest management strategies.
    MeSH term(s) Animal Distribution ; Animals ; Female ; Heteroptera/growth & development ; Heteroptera/physiology ; Insect Control/methods ; Lycopersicon esculentum/growth & development ; Male ; Nymph/growth & development ; Nymph/physiology ; Pest Control, Biological/methods ; Polymerase Chain Reaction/methods ; Predatory Behavior
    Language English
    Publishing date 2019-09-12
    Publishing country Australia
    Document type Journal Article
    ZDB-ID 2179775-4
    ISSN 1744-7917 ; 1672-9609
    ISSN (online) 1744-7917
    ISSN 1672-9609
    DOI 10.1111/1744-7917.12717
    Database MEDical Literature Analysis and Retrieval System OnLINE

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