Entomologia Experimentalis et Applicata最新文献

{"title":"Non-Target Effects of Some Common Agrochemicals on Various Life Stages and Parasitism Behaviour of Trichogrammatoidea cryptophlebiae Nagaraja, 1979 (Hymenoptera: Trichogrammatidae)","authors":"Emma Jane Thompson,&nbsp;Megan Mulcahy,&nbsp;Sean Thackeray,&nbsp;Sean Moore,&nbsp;Martin Hill","doi":"10.1111/eea.70152","DOIUrl":"https://doi.org/10.1111/eea.70152","url":null,"abstract":"<p>Macrobial biological control agents, such as parasitoids, play a pivotal role in Integrated Pest Management (IPM), yet their success depends on compatibility with agrochemicals commonly applied in cropping systems. The egg parasitoid <i>Trichogrammatoidea cryptophlebiae</i> Nagaraja, 1979 (Hymenoptera: Trichogrammatidae), widely released in South Africa for tortricid moth management, remains understudied regarding its responses to pesticides used in orchards. This study evaluated the acute and sublethal effects of a representative range of insecticides, fungicides, and biopesticides on multiple life stages of <i>T. cryptophlebiae</i>, applying the International Organisation for Biological Control (IOBC) classification system together with measures of parasitism, sex ratio, and pre-imaginal development. Adult survival alone was not a reliable indicator of chemical compatibility. The non-target effects of agrochemicals on <i>T. cryptophlebiae</i> varied across treatments and life stages, influencing adult survival, reproductive output, and developmental success. Several insecticides, particularly pyrethroids and other neuroactive compounds, permitted adult survival but were associated with pronounced reductions in parasitism, consistent with strong sublethal effects on parasitoid performance. In contrast, several fungicides and biopesticides were comparatively benign, having no effect on survival and reproduction. Sex ratios were largely unaffected across treatments. While IOBC mortality thresholds are a useful tool for initial screening of pesticide compatibility with <i>T. cryptophlebiae</i>, these results demonstrate that mortality-based classifications alone may underestimate incompatibility by failing to capture effects on reproduction and development that are critical to biological control efficacy. By providing the first published assessment of pesticide effects on <i>T. cryptophlebiae</i>, this study offers data relevant to IPM programmes in macadamias and other crops in South Africa and contributes evidence toward refining pesticide-natural enemy compatibility assessments.</p>","PeriodicalId":11741,"journal":{"name":"Entomologia Experimentalis et Applicata","volume":"174 8","pages":"942-956"},"PeriodicalIF":1.9,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eea.70152","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148532675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plant Traits and Reproduction in a Multitrophic System: The Role of Aphids, Parasitoids and Hyperparasitoids","authors":"Mitchel E. Bourne,&nbsp;Enric Frago,&nbsp;Nina Xiaoning Zhang,&nbsp;Erik H. Poelman,&nbsp;Maximilien A. C. Adam","doi":"10.1111/eea.70137","DOIUrl":"https://doi.org/10.1111/eea.70137","url":null,"abstract":"<p>Hyperparasitoids, which prey on parasitoids developing inside herbivorous hosts, can disrupt top-down control of herbivores in multitrophic food chains. Hyperparasitism releases herbivores from their natural enemies, thereby potentially increasing plant damage and reducing plant performance. However, how hyperparasitoids impact plant fitness under field conditions has not been studied. In this study, we performed a field mesocosm experiment in which we manipulated the presence of aphids <i>Myzus persicae</i> Sulzer (Hemiptera: Aphididae), parasitoids <i>Aphidius colemani</i> Viereck (Hymenoptera: Braconidae), and hyperparasitoids <i>Alloxysta victrix</i> Westwood (previously reported as <i>Alloxysta fuscicornis</i> Hartig) (Hymenoptera: Figitidae) on wild mustard plants <i>Sinapis arvensis</i> L. (Brassicales: Brassicaceae) to quantify their effects on plant performance and fitness. Parasitoids effectively suppressed aphid populations, but this control was weakened in the presence of hyperparasitoids. In addition, aphid parasitism rates by parasitoids were lower in the presence of hyperparasitoids. However, none of the treatments significantly affected plant traits such as leaf number, flowering time, seed weight and survival. In the absence of natural enemies, aphids marginally reduced seed production compared to plants exposed to aphids, parasitoids and hyperparasitoids, but this effect was weak. Overall, our results suggest that while parasitoids exert strong top-down control on aphids, <i>S. arvensis</i> can tolerate aphid herbivory. Consequently, the net fitness benefit of indirect defence via parasitoid recruitment—and its disruption by hyperparasitoids—appears to be limited in this system, potentially due to the rapid life cycle and tolerance strategy of <i>S. arvensis</i>.</p>","PeriodicalId":11741,"journal":{"name":"Entomologia Experimentalis et Applicata","volume":"174 8","pages":"822-830"},"PeriodicalIF":1.9,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eea.70137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148532590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prey Range and Voracity of Main Insect Natural Enemies of Pests in Corsican Clementine Orchards","authors":"Judith Le Nan,&nbsp;Ségolène Buzy,&nbsp;Manuel Plantegenest,&nbsp;Elsa Canard","doi":"10.1111/eea.70128","DOIUrl":"https://doi.org/10.1111/eea.70128","url":null,"abstract":"<p>Clementine trees are the target of numerous pests and pathogens. To face these attacks, pesticides are intensively used by farmers, degrading orchard ecosystems and biodiversity. To offer alternative solutions from pesticides, such as biocontrol, a better understanding of the natural regulation provided by natural enemies is required. Our study aimed to assess the biocontrol potential against the main arthropod pests of clementine orchards in Corsica based on the local composition and abundance of natural enemy communities, by taking into accounting the prey range and voracity of the most abundant predators. First, laboratory experiments were carried out using four specialist predators, the coccinellid species <i>Coccinella septempunctata</i> (L.), <i>Adalia bipunctata</i> (L.), <i>Propylea quatuordecimpunctata</i> (L.) and <i>Cryptolaemus montrouzieri</i> (Mulsant) (Coleoptera: Coccinellidae) and one generalist predator, the European earwig, <i>Forficula auricularia</i> (L.) (Dermaptera: Forficulidae). Their prey range and voracity were tested on 3 prey types: an aphid, <i>Aphis fabae</i> (Scopoli) (Hemiptera: Aphididae), a mealybug <i>Pseudoccocus/Planococcus</i> sp. (Hemiptera: Pseudococcidae), and a whitefly <i>Trialeurodes vaporariorum</i> (Westwood) (Hemiptera: Aleyrodidae). Then, in a set of monitored orchards, a global predation index at the scale of the entire community of insect predators on each prey was assessed by weighting the composition and abundance of the community by the voracity of each natural enemy species. Finally, this predation index was used to compare the biological control potential in organic and conventional orchards. The index highlighted no major effect of the type of management of the orchards on the biological control of pests. Only the contributor were different, and their abundances varied between orchard. The main aphid regulators were <i>C. septempunctata</i>, coccinellid larvae, and <i>F. auricularia</i>. For mealybugs, they were <i>C. montrouzieri</i> and <i>F. auricularia</i>, and for whiteflies, they were <i>C. septempunctata</i> and <i>F. auricularia</i>.</p>","PeriodicalId":11741,"journal":{"name":"Entomologia Experimentalis et Applicata","volume":"174 8","pages":"851-862"},"PeriodicalIF":1.9,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eea.70128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148534096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Toxicity of Bordeaux Mixture by Ingestion and Cuticular Contact Under Climate Change Conditions on Trichogramma cordubensis","authors":"William Nusillard,&nbsp;Tessie Garinie,&nbsp;Géraldine Groussier,&nbsp;Denis Thiéry,&nbsp;Jacques Frandon,&nbsp;Jérôme Moreau","doi":"10.1111/eea.70066","DOIUrl":"https://doi.org/10.1111/eea.70066","url":null,"abstract":"<p>In the face of environmental contamination to copper, mainly resulting from frequent copper-based fungicide applications, it is crucial to understand the side effects of these pesticides on non-target organisms to favor sustainable pest management. Pest natural enemies are indeed severely exposed to copper fungicides through external physical contact and by ingestion. In this study, we assessed the effects of Bordeaux mixture applications on the longevity of the biological control agent <i>Trichogramma cordubensis</i> (Vargas and Cabello, 1985) (Hymenoptera: Trichogrammatidae). The first set of experiments aimed to evaluate the effective doses of Bordeaux mixture contamination by using eight doses from 0 g.L⁻¹ to 160 g.L⁻¹. When ingesting honey contaminated with Bordeaux mixture the longevity of <i>T. cordubensis</i> was strongly reduced. Conversely, cuticular contact with Bordeaux mixture, without ingestion, had no effect on <i>T. cordubensis</i> longevity. The second set of experiments examined how the effects of Bordeaux mixture on <i>T. cordubensis</i> longevity were modulated by global warming conditions, under two fluctuating climatic regimes simulating current and future conditions in Burgundy, France. These experiments used effective doses obtained after the first experiments. Similarly to the first experiments, Bordeaux mixture ingestion led to strongly reduced longevity, whereas cuticular contact had no effects on <i>T. cordubensis</i> longevity. Warming conditions reduced <i>T. cordubensis</i> longevity by 36% after both ingestion and cuticular contact with Bordeaux mixture, with no statistical interaction with Bordeaux mixture. Ingesting Bordeaux mixture was considered to be slightly to moderately harmful, significantly reducing the longevity from 40% to 81% with increasing concentrations, whereas cuticular contact with Bordeaux mixture was harmless to <i>T. cordubensis</i>. This study sheds new light on the side effects of metal-based fungicides on natural enemies and their subsequent effects on biocontrol programs. It suggests that increasing temperatures should have deleterious effects on <i>Trichogramma</i> species, regardless of fungicide contamination by Bordeaux mixture.</p>","PeriodicalId":11741,"journal":{"name":"Entomologia Experimentalis et Applicata","volume":"174 8","pages":"957-967"},"PeriodicalIF":1.9,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eea.70066","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148532443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ecosystem Services Against Illegal Immigration: The Natural Control of the Migratory Butterfly Painted Lady (Vanessa cardui) by Cotesia vestalis (Hymenoptera, Braconidae) on Organic Soybean in Ukraine","authors":"Alex Gumovsky,&nbsp;Maryna Kaliuzhna,&nbsp;Valentyn Kulinich,&nbsp;Yurii Geryak","doi":"10.1111/eea.70119","DOIUrl":"https://doi.org/10.1111/eea.70119","url":null,"abstract":"<p>The Painted Lady, <i>Vanessa cardui</i> (Linnaeus) (Lepidoptera: Nymphalidae), a cosmopolitan migratory butterfly, was recorded as a significant pest of organic soybean (<i>Glycine max</i> L.) in central Ukraine. Multiple immigration waves of <i>V. cardui</i> from southern regions were observed in the Poltava Region (Kremenchuk District), notably during severe and moderate outbreaks in the summers of 2019 and 2022, respectively. Despite notable early-season defoliation in June, soybean crops demonstrated strong recovery, attributed to high levels of natural biological control. Caterpillars of <i>V. cardui</i> were heavily parasitized by the braconid parasitoid <i>Cotesia vestalis</i> (Hymenoptera: Braconidae: Microgastrinae) during July and August, with parasitism rates reaching up to 100% in several surveyed fields. Only isolated spots of <i>V. cardui</i> caterpillars persisted into late July–early August in both years, all of which were quickly suppressed by the parasitism of <i>C. vestalis</i>. In the studied region, <i>C. vestalis</i> also parasitized the diamondback moth, <i>Plutella xylostella</i> (Lepidoptera: Plutellidae), on wild Brassicaceae, which is likely serving as an alternative host during periods of low <i>V. cardui</i> abundance. This facultative host association may enhance the resilience and early-season availability of <i>C. vestalis</i> populations. The observed levels of natural suppression in organic systems contrast markedly with conventional practices, where broad-spectrum pesticides were routinely applied during <i>V. cardui</i> outbreaks. These findings highlight the value of conserving functional parasitoid communities in agroecosystems. For organic growers, reliance on ecosystem services provided not only effective pest control but also economic benefits through reduced input costs.</p>","PeriodicalId":11741,"journal":{"name":"Entomologia Experimentalis et Applicata","volume":"174 8","pages":"922-932"},"PeriodicalIF":1.9,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eea.70119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148532895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laboratory Biology, Immature and Adult Morphology of Trichopria drosophilae (Perkins) (Hymenoptera: Diapriidae), Parasitoids of Drosophila Flies","authors":"Alex Gumovsky,&nbsp;Jana Collatz,&nbsp;Lesia Tymochko,&nbsp;Lars Krogmann","doi":"10.1111/eea.70087","DOIUrl":"https://doi.org/10.1111/eea.70087","url":null,"abstract":"<p>The life history and immature stages of development of the wasp <i>Trichopria drosophilae</i> (Hymenoptera: Diapriidae), a biocontrol agent of drosophilid flies (Diptera: Drosophilidae), including the invasive <i>Drosophila suzukii</i>, were investigated. <i>T. drosophilae</i> develops as a solitary endoparasitoid from egg to adult in 22–26 days under laboratory conditions at room temperature. The egg of <i>T. drosophilae</i> is broad ovate, with a short petiole when freshly laid and is subsequently getting more elongate. There are three larval instars in <i>T. drosophilae</i>. The freshly hatched first instar larva has a narrow caudal part with a bifurcated indentated abdominal appendage, enlarged thoracic segments and a head with sclerotized sharp mandibles and large labial palpi. The second instar is poorly sclerotized with peculiar everted (exodont) mandibles. The third instar is grub-like, with three pairs of thoracic spiracles and stylet-shaped mandibles. The pupa of <i>T. drosophilae</i> is semitransparent and surrounded by numerous meconium pellets within the host puparium. Competition between conspecific rivals is observed. The siblicide is conducted using both the sharp mandibles and the small labrum and labium, which function like a sucker enabling emptying the rival's body. In the case of superparasitism, the first-instar larvae of the parasitoid are encapsulated within serosa membranes. Also, the peculiarities of adult morphology of <i>T. drosophilae</i>, as well as a comparison to similar European <i>Trichopria</i> species, are provided.</p>","PeriodicalId":11741,"journal":{"name":"Entomologia Experimentalis et Applicata","volume":"174 8","pages":"863-875"},"PeriodicalIF":1.9,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eea.70087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148522877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plant Domestication Affects the Oviposition Behavior and Performance of Ganaspis kimorum, a Parasitoid of Drosophila suzukii","authors":"Yahel Ben-Zvi,&nbsp;Cesar Rodriguez-Saona","doi":"10.1111/eea.70009","DOIUrl":"https://doi.org/10.1111/eea.70009","url":null,"abstract":"<p>The domestication syndrome refers to a suite of phenotypic changes that differentiate domesticated organisms from their wild relatives. Although such changes can influence plant-herbivore interactions, their effects on herbivores' natural enemies remain less explored. In highbush blueberries (<i>Vaccinium corymbosum</i> L.) (Ericales), domestication has resulted in larger fruits with reduced phenolic content, thereby enhancing the performance of the invasive spotted-wing drosophila (<i>Drosophila suzukii</i> Matsumura, Diptera: Drosophilidae). This study investigated how blueberry domestication affects the oviposition behavior and performance of <i>Ganaspis kimorum</i> Buffington (Hymenoptera: Figitidae), a larval endoparasitoid of <i>D. suzukii</i>. To assess oviposition behavior, gravid <i>G. kimorum</i> females were observed for 10 min on <i>D. suzukii</i>-infested wild diploid, wild tetraploid, and domesticated berries, and their on- and off-berry behaviors were recorded. Parasitoid performance was evaluated based on adult emergence rates, development time, and tibial length from infested wild and domesticated berries. Physical and chemical fruit traits, such as berry size, sugar content (°Brix), and total defensive phenolic content, were also quantified across domestication levels. Results showed that blueberry domestication significantly affected <i>G. kimorum</i> behavior and performance. Notably, female wasps spent more time searching on wild diploid berries as host number increased compared with other genotypes. However, offspring performance was higher in domesticated berries. Domesticated fruits were larger, less sweet, and contained lower phenolic content than wild berries. Thus, although <i>G. kimorum</i> readily oviposits in infested wild berries, these serve as suboptimal hosts for larval development. These findings highlight the impact of domestication on tri-trophic interactions and provide insights into the suitability of non-crop hosts for supporting biological control agents of <i>D. suzukii</i>.</p>","PeriodicalId":11741,"journal":{"name":"Entomologia Experimentalis et Applicata","volume":"174 8","pages":"908-921"},"PeriodicalIF":1.9,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eea.70009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148532835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing Methods for Measuring Predation: Toward a Quantitative–Informative Indicator of Natural Pest Control","authors":"Yann Tricault,&nbsp;Abel Masson,&nbsp;Sylvain Poggi,&nbsp;Elsa Canard,&nbsp;Manuel Plantegenest","doi":"10.1111/eea.70099","DOIUrl":"https://doi.org/10.1111/eea.70099","url":null,"abstract":"<p>The transition to insecticide-free pest management requires field-based measurements of natural regulation capturing trophic networks driving pest suppression. Conventional proxies (pest abundance, predator abundance, and richness) fail to quantify actual predation or species contributions. A quantitative–informative indicator must couple trophic interactions, spanning specialist to generalist predators, with specific predation rates (daily prey consumed per predator). We evaluated major predation quantification methods in relation to their potential to inform such an indicator. These included four direct approaches (predator observation, sentinel prey, exclusion devices, predation signs), two indirect approaches (prey remains and molecular traces in predator guts), and three inferential approaches (trait-based analyses, population dynamics modelling, and inference from molecular prey detection). Seven criteria guided the comparison: type of predation measurement, taxonomic resolution for prey and predators, capacity to reveal trophic links, applicability across predator diversity, generality of results, and practical feasibility. We also compared the few approaches for converting molecular detection data into quantitative estimates of predation. Our synthesis highlights inference from molecular prey detection as the most promising and versatile method, as it simultaneously reveals trophic interactions and yields data that can be translated into predation rates. In contrast, common methods such as exclusion devices provide broad estimates of pest suppression but obscure trophic complexity, limiting ecological insight and constraining targeted management in favor of the most effective predator species. Integrating molecular detection with modeling inference emerges as a robust way to estimate predation rates on multiple pests across entire predator communities. This combination offers a powerful framework for developing a biological control indicator, though practical implementation will require improved molecular assays and more effective sampling strategies in the field.</p>","PeriodicalId":11741,"journal":{"name":"Entomologia Experimentalis et Applicata","volume":"174 8","pages":"801-811"},"PeriodicalIF":1.9,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eea.70099","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148533818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From Fundamental Laboratory to Applied Field Research: Entomophagous Insects as Models of Interest to a Broad Scientific Community","authors":"Christophe Bressac,&nbsp;Marlène Goubault,&nbsp;Vincent Foray,&nbsp;Jean-Michel Drezen,&nbsp;Leo W. Beukeboom","doi":"10.1111/eea.70149","DOIUrl":"https://doi.org/10.1111/eea.70149","url":null,"abstract":"<p>This special issue comprises papers presented at the 8th International Entomophagous Insects Conference (IEIC8), which took place in Tours, France in 2025. The first applied interest of entomophagous insects is their crucial role in biocontrol, as positive agents limiting other insects known as pests. But, beyond their agronomic value, these insects are fascinating models to investigate physiology, genetics, immunity, behavior, and many other biological traits at different integrative levels. This special issue includes 16 research papers giving examples of topics that were presented and discussed during the conference. It illustrates the diversity of interests around those fascinating insects that are enemies of other insects.</p>","PeriodicalId":11741,"journal":{"name":"Entomologia Experimentalis et Applicata","volume":"174 8","pages":"797-800"},"PeriodicalIF":1.9,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eea.70149","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148532676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Experimental Setup to Study the Olfactory Behaviour of Trichogramma Egg Parasitoids","authors":"Cécile Bresch,&nbsp;Louise van Oudenhove","doi":"10.1111/eea.70048","DOIUrl":"https://doi.org/10.1111/eea.70048","url":null,"abstract":"<p><i>Trichogramma</i> are tiny wasps commonly used in augmentative biocontrol against many Lepidopteran pests. We designed a specific experimental setup to study their olfactory preferences related to egg-laying behavior. This Y-shaped olfactometer was coupled with an image-recognition model, trained with artificial intelligence, to automatically count the number of parasitized eggs. A Bayesian inference pipeline was developed to analyze the data and estimate the attraction or repulsion elicited by the tested odors. We used <i>Trichogramma cordubensis</i> as a model species to validate the new experimental setup, and we demonstrated that <i>T. cordubensis</i> females were attracted to honey and to the sexual pheromone of a potential host (<i>Mythimna unipuncta</i>), while they were repelled by vinegar or peppermint essential oil. Overall, this new experimental device will be useful for studying <i>Trichogramma</i> behavioral responses to odors.</p>","PeriodicalId":11741,"journal":{"name":"Entomologia Experimentalis et Applicata","volume":"174 8","pages":"968-974"},"PeriodicalIF":1.9,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eea.70048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148532640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}