Environmental Entomology最新文献_第10页

The natural enemy complex on Russian wheat aphid (Hemiptera: Aphididae) in winter wheat in dryland agroecosystems. 旱地农业生态系统冬小麦中俄罗斯小麦蚜虫的天敌复合体。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf111

Scott C Merrill, Darren M Cockrell, Terri L Randolph, Cynthia Walker, Lauren M Kerzicnik, Frank Peairs, Mike Koch, Paul J Ode

{"title":"The natural enemy complex on Russian wheat aphid (Hemiptera: Aphididae) in winter wheat in dryland agroecosystems.","authors":"Scott C Merrill, Darren M Cockrell, Terri L Randolph, Cynthia Walker, Lauren M Kerzicnik, Frank Peairs, Mike Koch, Paul J Ode","doi":"10.1093/ee/nvaf111","DOIUrl":"10.1093/ee/nvaf111","url":null,"abstract":"In the years immediately following its introduction in 1986, the Russian wheat aphid Diuraphis noxia (Kurdjumov) became a significant pest of wheat in the western United States. In recent years, however, there have been few reports of economically damaging populations and lower numbers of Russian wheat aphid collected in suction traps. Here, we present evidence that the existing natural enemy complex may significantly reduce Russian wheat aphid populations even if no single species can be shown to be highly effective. In this study, we used 3 exclusion cage treatments (fully caged, partially caged, and uncaged plots) to explore the effects of the existing natural enemy complex on Russian wheat aphid populations in winter wheat in 3 fields across a north-south gradient in eastern Colorado: Fort Collins (northeastern Colorado), Akron (eastern Colorado), and Lamar (southeastern Colorado). Natural enemies were collected and identified. Fewer aphids and symptomatic wheat tillers were found in the uncaged treatment and partially caged treatments than in the caged treatment, which excluded the possibility of natural enemy attack on aphids, suggesting that natural enemies were responsible for suppressing Russian aphid populations in the open cage treatments. Predators were collected on both early and later growth stages of wheat, whereas parasitoids were found only on the later growth stage. Together, these findings suggest that the natural enemy complex is responsible for reducing Russian wheat aphid abundance among different dryland agroecosystems and climatic conditions.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1163-1170"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145476810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monitoring Eastern flower thrips and soybean thrips (Thysanoptera: Thripidae) and the generalist predator, insidious flower bug (Hemiptera: Anthocoridae) in the American Midwest Suction Trap Network. 美国中西部吸力诱捕网对东部花蓟马和大豆蓟马（蓟翅目：蓟科）及多面手捕食者潜伏花蝽（半翅目：花蝽科）的监测。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf102

Doris M Lagos-Kutz, Nicholas J Seiter, Kelley Tilmon, Anthony J McMechan, Glen L Hartman, Steven J Clough, Brenda Molano-Flores, Michael S Crossley

{"title":"Monitoring Eastern flower thrips and soybean thrips (Thysanoptera: Thripidae) and the generalist predator, insidious flower bug (Hemiptera: Anthocoridae) in the American Midwest Suction Trap Network.","authors":"Doris M Lagos-Kutz, Nicholas J Seiter, Kelley Tilmon, Anthony J McMechan, Glen L Hartman, Steven J Clough, Brenda Molano-Flores, Michael S Crossley","doi":"10.1093/ee/nvaf102","DOIUrl":"10.1093/ee/nvaf102","url":null,"abstract":"Eastern flower thrips (Frankliniella tritici, Fitch) and soybean thrips (Neohydatothrips variabilis, Beach) are vectors of soybean vein necrosis virus (SVNV) and have increased in importance since the detection of the SVNV in 2008 in Arkansas. Understanding the factors that influence the timing and extent of these insects' activity, along with their predators such as the insidious flower bug (Orius insidiosus, Say), could contribute to improved management. Here, we compiled monitoring data between 2020 and 2023 from the American Midwest Suction Trap Network and examined associations between the timing of early and late activity, cumulative activity density, weather, landscape composition, and host plant phenology. We found that the activity of Eastern flower thrips began earlier, and insidious flower bug activity occurred later when conditions were warmer. In contrast, the activity of soybean thrips began earlier when there was higher edge density in the landscape but was not coincident with the timing of soybean bloom, suggesting an important role for noncrop host plants in early activity of these insects. Despite becoming active later, soybean thrips had greater cumulative activity density where it was warmer, a discordance suggesting the importance of migration in their overall abundance. Suction trap captures might therefore reflect the influences of local conditions as well as migratory movements on soybean thrips activity. Soybean thrips and insidious flower bug cumulative activity densities were also found to be positively correlated, suggesting that insidious flower bugs may be opportunistically utilizing soybean thrips as prey. Continued regional monitoring of these insects could be used to improve vector management.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1432-1444"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145343891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A proposed method for estimating habitat suitability of weed biological control agents with experimentally derived thermal injury and weather data. 提出了一种利用热伤害和天气数据估算杂草生物防治剂生境适宜性的方法。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf099

Ian A Knight, Felix E Bingham, Megann M Harlow, Annie H Huang, Chelsea Bohaty, Nathan E Harms

{"title":"A proposed method for estimating habitat suitability of weed biological control agents with experimentally derived thermal injury and weather data.","authors":"Ian A Knight, Felix E Bingham, Megann M Harlow, Annie H Huang, Chelsea Bohaty, Nathan E Harms","doi":"10.1093/ee/nvaf099","DOIUrl":"10.1093/ee/nvaf099","url":null,"abstract":"Ecological niche modelling provides a tool for making a priori predictions of habitat suitability for biological control agents. Current approaches may be limited by available data but improved by the incorporation of physiological data. Alligatorweed, Alternanthera philoxeroides (Mart.) Griseb. (Caryophyllales: Ameranthaceae), is controlled across much of its introduced range in the United States of America by the alligatorweed flea beetle, Agasicles hygrophila Selman and Vogt (Coleoptera: Chrysomelidae); however, insufficient control is observed at temperate latitudes. Investigations into alligatorweed thrips, Amynothrips andersoni O'Neill (Thysanoptera: Phlaeothripidae), indicate that they are more cold-tolerant with a broader predicted range. The upper limit of the chill injury zone (ULCIZ) and the sum of injurious temperatures (SIT) are measures that can be used to compare relative cold tolerance among biocontrol agents. Here we propose a method for integrating these parameters with weather data to predict overwintering mortality. The ULCIZ and SIT of Am. andersoni and Ag. hygrophila were experimentally determined, then habitat suitability for each species was modeled using the proposed method and 20 yr of weather data. ULCIZ was -2.94 and 4.52 °C, and SIT was 307.19 and 251.27 for Am. andersoni and Ag. hygrophila, respectively, indicating that Am. andersoni begins accumulating chill injury at a lower temperature than Ag. hygrophila and does so at a slower rate. Using this method, 91.8% of Al. philoxeroides's range in the USA was predicted to fall within highly or moderately suitable habitat for Am. andersoni, compared to 15.9% for Ag. hygrophila. Ranges predicted by the proposed method are similar to previous correlative ENMs.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1179-1186"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12716278/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145205925","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}

引用次数: 0

A viral biopesticide from native Hyphantria cunea granulovirus (HycuGV) to control fall webworm (Hyphantria cunea, Drury, Lepidoptera: Arctiidae) under field conditions. 本品为一种在田间条件下防治秋网虫（中国棘球蚴颗粒病毒，棘球蚴，鳞翅目：夜蛾科）的生物农药。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf107

Zeynep Bayramoğlu, Dönüş Gençer, İslam Saruhan, Zeynep Şahin Taylan, İsmail Demir

{"title":"A viral biopesticide from native Hyphantria cunea granulovirus (HycuGV) to control fall webworm (Hyphantria cunea, Drury, Lepidoptera: Arctiidae) under field conditions.","authors":"Zeynep Bayramoğlu, Dönüş Gençer, İslam Saruhan, Zeynep Şahin Taylan, İsmail Demir","doi":"10.1093/ee/nvaf107","DOIUrl":"10.1093/ee/nvaf107","url":null,"abstract":"This study evaluated the efficacy and shelf life of a locally developed viral prototype product based on Hyphantria cunea granulovirus (HycuGV-Hc1) for the control of the fall webworm (Hyphantria cunea Drury; Lepidoptera: Arctiidae), a polyphagous pest commonly observed in the Black Sea and Marmara regions of Turkey, under field conditions. The field trials were conducted in Trabzon, in the Eastern Black Sea Province, during 2022 and 2023. The viral formulation was tested on mulberry, hazelnut, and walnut host plants against Hyphantria cunea larvae at 2 × 108, 2 × 107, and 2 × 106 occlusion body (OB)/ml concentrations. AGREE 50 WG (Commercial Product), which contains 50% Bacillus thuringiensis as the active ingredient used in Turkey against H. cunea was used as a comparison. At the highest concentration, the mortality rates were recorded at 85.42%, 80.85%, and 79.59% for mulberry, hazelnut, and walnut plants, respectively. When comparing the control groups across different plants, the most damage was observed on the mulberry plant. Comparable efficacy was observed with the commercial B. thuringiensis pesticide. In the shelf-life study, formulations prepared for different periods (0, 6, and 12 mo) were found to have similar mortality effects. The local viral prototype product displayed significant potential for controlling Hyphantria cunea in the field condition at 7 d after application.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1292-1299"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12716273/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145312622","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}

引用次数: 0

Larval development and parasitism of emerald ash borer in Chionanthus virginicus (Oleaceae): Implications for biological control. 绿灰螟虫的幼虫发育与寄生：生物防治的意义。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-10-01 DOI: 10.1093/ee/nvaf077

Heather L Callahan, Jian J Duan, Douglas W Tallamy

{"title":"Larval development and parasitism of emerald ash borer in Chionanthus virginicus (Oleaceae): Implications for biological control.","authors":"Heather L Callahan, Jian J Duan, Douglas W Tallamy","doi":"10.1093/ee/nvaf077","DOIUrl":"10.1093/ee/nvaf077","url":null,"abstract":"Emerald ash borer (Agrilus planipennis Fairmaire) is an invasive wood-boring beetle that has killed millions of ash trees (Fraxinus spp.) across North America. In 2014, emerald ash borer was discovered attacking white fringetrees (Chionanthus virginicus L.) in Ohio, indicating a host range expansion. Since then, emerald ash borer activity in white fringetree has been confirmed in additional states, posing a potential threat to this native tree in natural and managed ecosystems. Though emerald ash borer can complete a full life cycle in white fringetree, there has been little research into the comparative success with which emerald ash borer develops in this novel host versus ash, or how introduced biocontrol agents will respond. We conducted laboratory and field infestations of white fringetree and ash in Delaware to compare the timing of emerald ash borer larval development and the associated response of larval parasitoids. In lab-infested white fringetree bolts, emerald ash borer developed slowly, with no larvae reaching the mature J-shaped larval stage (JL) during the 14-wk lab study, compared with all surviving larvae developing to the J-shaped larval stage in ash. Field results showed delayed emerald ash borer development and reduced survival in white fringetree, with just 1 larva out of 158 reaching the JL stage over 2 growing seasons. There was no parasitism of emerald ash borer larvae in lab- or field-infested white fringetree, likely because few larvae in this host reached instars suitable for larval parasitism. Overall, this study suggests that emerald ash borer populations in white fringetree are not self-sustaining, though further studies should be conducted using larger fringetree material, as small sizes may negatively impact larval survival.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1096-1106"},"PeriodicalIF":1.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144999980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Species-dependent captures of three Limonius pest click beetle (Coleoptera: Elateridae) species in western North America with aerial and ground traps. 用空中和地面诱捕器捕获北美西部三种利蒙尼害虫蠓（鞘翅目：蠓科）。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-10-01 DOI: 10.1093/ee/nvaf078

Willem G van Herk, Haley A Catton, Kevin Wanner, Emily Lemke, Jacqueline M Serrano

{"title":"Species-dependent captures of three Limonius pest click beetle (Coleoptera: Elateridae) species in western North America with aerial and ground traps.","authors":"Willem G van Herk, Haley A Catton, Kevin Wanner, Emily Lemke, Jacqueline M Serrano","doi":"10.1093/ee/nvaf078","DOIUrl":"10.1093/ee/nvaf078","url":null,"abstract":"In western North America, 3 pest wireworms in the genus Limonius co-occur on farmland, and the click beetle adult males respond to the same single-component sex attractant, limoniic acid. While divergence in seasonal occurrence may provide a means of separating sexual communication for Limonius canus (LeConte) and Limonius californicus (Mann.), both species overlap temporally with Limonius infuscatus (Mots.), suggesting the existence of additional reproductive isolating mechanisms. To determine the effect of trap height on the relative captures of these species, we deployed ground-based Vernon Pitfall Traps and aerially suspended Japanese Beetle traps baited with limoniic acid dispensed from rubber septa or plastic capsules, in British Columbia, Alberta, Washington state, and Montana. The proportion collected of each species differed among study locations, but our data indicate species differ in trap preference, with L. infuscatus and L. californicus preferring ground traps, and L. canus preferring aerial traps. This possibly reflects preferences in where species locate mates, and therefore another separation mechanism. Lure type also had a significant effect on captures in most studies, with generally more L. californicus and/or L. infuscatus collected if capsule dispensers, and more L. canus if septa dispensers were used. Implications for monitoring these species with these trap and dispenser combinations are discussed.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1060-1069"},"PeriodicalIF":1.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145033027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring dynamics of nature's raincoat: comparing how nano-scale silk fibers produced by dryland and tropical species of webspinning insects interact with water. 探索大自然雨衣的动力学：比较由旱地和热带织网昆虫产生的纳米级丝纤维如何与水相互作用。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-10-01 DOI: 10.1093/ee/nvaf071

Richard P Barber, Emily A Arias, Andrew M Schatz, Aidan Kaneski, Janice S Edgerly

{"title":"Exploring dynamics of nature's raincoat: comparing how nano-scale silk fibers produced by dryland and tropical species of webspinning insects interact with water.","authors":"Richard P Barber, Emily A Arias, Andrew M Schatz, Aidan Kaneski, Janice S Edgerly","doi":"10.1093/ee/nvaf071","DOIUrl":"10.1093/ee/nvaf071","url":null,"abstract":"Embiopterans are reliant on silk for protection and produce the finest silk fibers known in nature. This report compares silk-water interactions for four species representing two different lifestyles: two tropical arboreal species that feed on lichens on bark and two detritivores from arid regions that typically live in leaf litter and underground. Water droplets placed on spun silk transformed the fibrous top layer to a film. Arboreal embiopterans spun a denser silk covering than did the detritivores. The films that formed after exposure to water were also denser for the arboreal species. A possible underlying cause for the difference between the two lifestyles is because detritivores stitch together dried leaves and other detritus to create cover, they may rely more on substrate than on silk alone for protection. In contrast, arboreal embiopterans exposed on the surface of bark rely on thick silk coverings. Contact angles of water droplets on silk revealed that the silks tended to be more hydrophilic than a hydrophobic control, perhaps explaining why silks exposed to water become transformed by water-protein interactions. Results suggest that interesting variability in silk-water interactions exists for this little-known group insects, that also produce silk proteins of high crystallinity and with variable amino acids, one species to the next.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1115-1123"},"PeriodicalIF":1.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12543319/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144616874","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}

引用次数: 0

Seasonal phenology of Empoasca fabae (Hemiptera: Cicadellidae) in Québec, Canada. 加拿大魁省蚕豆蝇的季节物候特征（半翅目：蚕豆蝇科）。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-10-01 DOI: 10.1093/ee/nvaf070

Abraão Almeida Santos, Fausto Henrique Vieira Araújo, Nicolas Plante, Ricardo Siqueira da Silva, Edel Pérez-Lopéz

{"title":"Seasonal phenology of Empoasca fabae (Hemiptera: Cicadellidae) in Québec, Canada.","authors":"Abraão Almeida Santos, Fausto Henrique Vieira Araújo, Nicolas Plante, Ricardo Siqueira da Silva, Edel Pérez-Lopéz","doi":"10.1093/ee/nvaf070","DOIUrl":"10.1093/ee/nvaf070","url":null,"abstract":"Climate change is reshaping insect population dynamics in North America, notably impacting the migratory pest Empoasca fabae (Harris) (Hemiptera: Cicadellidae). While its phenology is well studied in the United States, knowledge gaps exist regarding its dynamics in Eastern Canada, one of its northernmost migration areas. Our study integrates degree-day models, CLIMEX ecological niche modeling, and field-collected data from Québec to assess E. fabae seasonal phenology and monthly climatic suitability. Our results indicate that E. fabae completes one to two generations in Québec, with earlier emergence and higher generational potential in warmer southeastern regions compared to cooler northeastern regions. CLIMEX modeling showed that suitable climatic conditions for E. fabae growth begin in April, peak from May to September, and decline by November. First adult captures occurred from late May to early June, with population peaks in June-July and a decrease by September. Observed adult peaks occurred earlier than predicted by degree-day models, suggesting that additional environmental factors, such as wind patterns and host plant availability, influence early-season population dynamics. This study provides a comprehensive understanding of E. fabae phenology in Québec and highlights the importance of incorporating regional climate to predict population trends. Further research on diapause onset, late-season persistence, and migration patterns is needed to refine predictive models and inform pest management strategies in Québec. Understanding these factors will be essential in mitigating potential economic impacts amid ongoing climate change.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1124-1135"},"PeriodicalIF":1.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12543320/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144607775","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}

引用次数: 0

Dietary and multitrophic effects of the furanocoumarin xanthotoxin differ between two confamilial generalist herbivores, Chrysodeixis includens and Trichoplusia ni (Lepidoptera: Noctuidae). 呋喃香豆素黄毒素的食性和多营养效应在两种家族通用型食草动物黄蝇和毛蝇（鳞翅目：夜蛾科）之间存在差异。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-10-01 DOI: 10.1093/ee/nvaf090

Rediate K Degu, Eamon McDaniel, M Wyatt McManus, Kaitlyn M Timmons, Evan C Lampert

{"title":"Dietary and multitrophic effects of the furanocoumarin xanthotoxin differ between two confamilial generalist herbivores, Chrysodeixis includens and Trichoplusia ni (Lepidoptera: Noctuidae).","authors":"Rediate K Degu, Eamon McDaniel, M Wyatt McManus, Kaitlyn M Timmons, Evan C Lampert","doi":"10.1093/ee/nvaf090","DOIUrl":"10.1093/ee/nvaf090","url":null,"abstract":"Different generalist herbivore species within a lineage can differ in their responses to a single plant defensive trait. Herbivore responses to plant defensive traits can also influence their interactions with their own natural enemies. Here, we rear 2 generalist herbivores, Trichoplusia ni Hübner (Lepidoptera: Noctuidae) and Chrysodeixis includens (Walker) (Lepidoptera: Noctuidae), on artificial diets containing 0%, 0.01%, 0.05%, and 0.10% xanthotoxin. We measured and compared growth rate, body size, and mortality among these 4 dietary xanthotoxin concentrations. C. includens grew more slowly and was more likely to die before adulthood as dietary xanthotoxin increased and also varied in body size. Trichoplusia ni had a higher mortality rate overall, which increased as dietary xanthotoxin increased; however, there were no effects on growth rate and body size for this species. In a second experiment, the same 4 diets were given to larvae of both species parasitized by the polyembryonic parasitoid Copidosoma floridanum Ashmead (Hymenoptera: Encyrtidae), and growth rate, mummy size, and mortality were measured and compared. There were no sublethal effects on growth rate or mummy size, and mortality increased in both herbivore species but was higher in C. includens. These results show that different generalist herbivore species can respond differently to plant defensive traits, possibly due to different levels of adaptations to a specific trait, and these responses can affect higher trophic levels. Further research can compare the multitrophic impacts of variation in responses to plant defensive traits among more generalist herbivores.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1107-1114"},"PeriodicalIF":1.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145085472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Changes in the supercooling ability of Holotrichia oblita (Coleoptera: Scarabaeidae) under low-temperature stress. 低温胁迫下圆毛蝗过冷能力的生理生态学变化。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-10-01 DOI: 10.1093/ee/nvaf081

Yana Xue, Yan Yan, Meifeng Ren, Daqi Li, Yi Wang, Junjiao Lu

{"title":"Changes in the supercooling ability of Holotrichia oblita (Coleoptera: Scarabaeidae) under low-temperature stress.","authors":"Yana Xue, Yan Yan, Meifeng Ren, Daqi Li, Yi Wang, Junjiao Lu","doi":"10.1093/ee/nvaf081","DOIUrl":"10.1093/ee/nvaf081","url":null,"abstract":"The scarab beetle Holotrichia oblita Faldermann (Coleoptera: Scarabaeidae) is an economically significant subterranean pest in northern China. Studying the cold tolerance of this pest can elucidate its overwintering survival strategies, thereby providing a scientific basis for predicting its populations and developing precise overwintering control measures. In this study, we evaluated the supercooling capacity of H. oblita at various developmental stages, including larval instars, egg, pupa, and adult stages for males and females. We also examined survival rates and changes in supercooling ability under low-temperature stress. Our research found that SCPs varied significantly across developmental stages, and the lowest SCPs occurred in larvae, followed by pupae, eggs, and adults. However, no significant differences were found between the SCPs of H. oblita pupae or between male and female adults. For larvae of different day-ages, the mean supercooling points (SCPs) ranged from -3.74 to -5.37 °C. After exposure to low temperatures, the SCPs of third instar larvae ranged from -8.0 to -1.6 °C. The median lethal temperature of third instar larvae was -1.27 °C. The results of our study show that H. oblita is a cold-intolerant insect. While this species has limited cold tolerance, it burrows deep into the soil in the winter and therefore is unlikely to be exposed to lethal temperatures. This study offers insights into the overwintering strategies of H. oblita and provides a foundation for predicting larvae overwintering populations.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1070-1076"},"PeriodicalIF":1.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145085455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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