Journal of economic entomology最新文献

Evaluating a novel core-and-perimeter delimiting trapping survey design for insects. I. Field experiment. 评价一种新的昆虫核周定界诱捕调查设计。1、野外试验。

Journal of economic entomology Pub Date : 2025-06-14 DOI: 10.1093/jee/toaf095

Barney P Caton, Hui Fang, Ernie Hain, Nadya Kandel, Rosalie Nelson, Godshen R Pallipparambil, Nicholas C Manoukis

{"title":"Evaluating a novel core-and-perimeter delimiting trapping survey design for insects. I. Field experiment.","authors":"Barney P Caton, Hui Fang, Ernie Hain, Nadya Kandel, Rosalie Nelson, Godshen R Pallipparambil, Nicholas C Manoukis","doi":"10.1093/jee/toaf095","DOIUrl":"https://doi.org/10.1093/jee/toaf095","url":null,"abstract":"We propose a novel \"core-and-perimeter\" delimiting trapping design for invasive insects, improving upon the ubiquitous fully trapped square grids using regular spacing. The core-and-perimeter design has traps near the epicenter and in a perimeter set at a distance to result in zero captures, to directly set the population boundary. We compared the core-and-perimeter and fully trapped designs in a mark-release-recapture experiment with Ceratitis capitata (Weidemann) (Diptera: Tephritidae) in Hawaii in 2022. Each design had 4 repetitions with 4 separate releases of flies and 6 collection days from 1 to 14 d after release. The square fully trapped grid had 20 core area traps plus 79 other traps in 0.92 km2, plus 24 \"sentinel\" traps beyond. The circular core-and-perimeter grid had 20 core traps, and 108 traps in a 220 m-wide perimeter, set 500 m from the release point (smaller than the recommended radius). Slightly more flies on average were captured in the fully trapped treatment but proportional captures in common locations were similar. Flies were caught in the sentinel traps in every replicate of the fully trapped treatment. Four percent of captures occurred in the perimeter of the core-and-perimeter treatment on average. Trap usage rate for the fully trapped design was 67%, while for the core area of the core-and-perimeter design was nearly 94%. Overall mean daily dispersal distance was 96.3 m, and the regression-based 99th percentile of total distance was 700 m. Results supported the potential of the core-and-perimeter design and demonstrated 2 fully trapped design disadvantages-trap inefficiency and egress potential.","PeriodicalId":94077,"journal":{"name":"Journal of economic entomology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144304108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Demographic parameters and asynchronous ovary development in Eocanthecona furcellata (Hemiptera: Pentatomidae) reared on different diets. 不同日粮饲养的毛棘刺槐（半翅目：蝽科）种群统计参数与卵巢非同步发育。

Journal of economic entomology Pub Date : 2025-06-13 DOI: 10.1093/jee/toaf040

Jinge Yuan, Dong Xiang, Haozhuo Yang, Huanhuan Zhang, Hanqiu Chen, Huai Liu, Yaying Li

{"title":"Demographic parameters and asynchronous ovary development in Eocanthecona furcellata (Hemiptera: Pentatomidae) reared on different diets.","authors":"Jinge Yuan, Dong Xiang, Haozhuo Yang, Huanhuan Zhang, Hanqiu Chen, Huai Liu, Yaying Li","doi":"10.1093/jee/toaf040","DOIUrl":"10.1093/jee/toaf040","url":null,"abstract":"The stink bug, Eocanthecona furcellata Wolff (Hemiptera: Pentatomidae) shows significant promise as a biological control agent against lepidopteran pests in tropical and subtropical areas. However, securing suitable food remains a persistent issue for the mass rearing of this beneficial insect. To understand how different feeding strategies impact reproductive success, we evaluated their effects on critical life table parameters and ovary development using a range of feeding options: natural prey Spodoptera litura Fabricius (Lepidoptera: Noctuidae) and Spodoptera exigua Hubner, alternative prey Tenebrio molitor Linnaeus (Coleoptera: Tenebrionidae), and an advanced artificial diet. E. furcellata fed on S. litura had the highest fecundity (326.96 eggs) and net reproduction rate (86.04 offspring). Moreover, those fed T. molitor exhibited the highest survival rate during the nymph stage (61.86%). Among all tested treatments, ovarian tube length reached its peak on the 14th day following the emergence of the adult. The group fed S. litura had the longest average length (4.021 mm), followed by those fed S. exigua (3.986 mm) and T. molitor (3.904 mm). Notably, E. furcellata fed on S. exigua displayed the highest number of fully developed follicles between days 3 and 21 after emergence. This research underscores the efficacy of utilizing natural prey, especially S. litura, and alternative prey, T. molitor, for enhancing the reproductive success and survival of E. furcellata, providing critical insights for optimizing mass-rearing techniques and informing integrated pest management strategies that leverage this beneficial insect for effective biological control across diverse agricultural systems.","PeriodicalId":94077,"journal":{"name":"Journal of economic entomology","volume":" ","pages":"1051-1060"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct lethality and time-delayed sublethal effects of multiple types of insecticide netting against stored product insects. 多种杀虫剂网对储藏产品昆虫的直接致死效应和延时亚致死效应。

Journal of economic entomology Pub Date : 2025-06-13 DOI: 10.1093/jee/toaf059

Sabita Ranabhat, Jennifer Abshire, Avery James, Deanna S Scheff, Georgina V Bingham, Kun Yan Zhu, William R Morrison

{"title":"Direct lethality and time-delayed sublethal effects of multiple types of insecticide netting against stored product insects.","authors":"Sabita Ranabhat, Jennifer Abshire, Avery James, Deanna S Scheff, Georgina V Bingham, Kun Yan Zhu, William R Morrison","doi":"10.1093/jee/toaf059","DOIUrl":"10.1093/jee/toaf059","url":null,"abstract":"Long-lasting insecticide-incorporated netting (LLIN) is being evaluated in agriculture as part of holistic integrated pest management programs. The aims of the current study were to (i) evaluate the efficacy of the commonly used LLINs (deltamethrin, alpha-cypermethrin, and etofenprox) for direct lethality, (ii) assess the baseline mobility after exposure, and (iii) to evaluate the sublethal effects among LLINs against Rhyzopertha dominica and Tribolium castaneum. To accomplish this, we exposed cohorts of both species to 0.4% (w/w) deltamethrin, 0.34% alpha-cypermethrin, or 8% etofenprox for periods of 5, 60, or 120 min in the laboratory, and checked individuals for the condition after a duration of 0, 24, 72, or 168 h. The movement of alive and affected adults was assessed using Ethovision software over 60-min trials after a 5- or 60-min exposure to LLIN immediately or 72 h after exposure. After exposure for 60-min to deltamethrin and alpha-cypermethrin LLIN, mortality for both species was 86% to 98% higher when compared to the controls without insecticide. Etofenprox performed worse than the other active ingredients (AIs). In the baseline mobility assay, R. dominica netting exhibited a thigmotactic effect on movement, but not for T. castaneum. For both species, the movement was reduced by 77% to 99% deltamethrin netting above and beyond the thigmotactic effects. There was a sublethal reduction in movement after a 60-min exposure to both LLINs by 95% to 98% compared to control netting without insecticide. Overall, this study helps delineate the relationship in efficacy between these AIs for 2 cosmopolitan, destructive stored product insects.","PeriodicalId":94077,"journal":{"name":"Journal of economic entomology","volume":" ","pages":"1419-1430"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Functional response of the native natural enemy of Dryinus sinicus (Hymenoptera: Dryinidae) to different instars of spotted lanternfly (Lycorma delicatula, Hemiptera: Fulgoridae). 本土天敌干蝇（膜翅目：干蝇科）对不同龄斑灯蝇（半翅目：斑灯蝇科）的功能反应

Journal of economic entomology Pub Date : 2025-06-13 DOI: 10.1093/jee/toaf061

Yutong Zhuang, Kexin Bao, Xiaoyi Wang

{"title":"Functional response of the native natural enemy of Dryinus sinicus (Hymenoptera: Dryinidae) to different instars of spotted lanternfly (Lycorma delicatula, Hemiptera: Fulgoridae).","authors":"Yutong Zhuang, Kexin Bao, Xiaoyi Wang","doi":"10.1093/jee/toaf061","DOIUrl":"10.1093/jee/toaf061","url":null,"abstract":"Dryinus sinicus Olmi (Hymenoptera: Dryinidae) is a key natural enemy of the nymphs of spotted lanternfly, Lycorma delicatula White (Hemiptera: Fulgoridae), a significant pest in agricultural and forest ecosystems. This study investigates the functional response of female D. sinicus to the first-, second-, and third-instar nymphs of L. delicatula, as well as the intraspecific competition within D. sinicus populations. D. sinicus responded to the increasing prey density of L. delicatula nymphs of different instars by consuming more number of prey than prey consumed at lower prey densities and exhibited Holling's type II curvilinear responses. However, search efficiency decreases with increasing prey density. The predation effect of D. sinicus on the first-instar L. delicatula nymphs was the best, the attack rate per handling time (a'/Th) was 14.9712 and an individual female wasp's attack rate (a') was 1.0091, the handling time (Th) to 1 instar L. delicatula nymphs was 0.0674 and the maximum theoretical rate of prey consumed per 24 h (T/Th) was 14.8368. The intensity of the scrambling competition increasing with increases predator density, but the capita prey consumed level and per capital predation efficiency decreased significantly when the predator density ranged from 1 to 5. The results indicate that intraspecific interference occurs when multiple females of D. sinicus prey on L. delicatula in the same area. Overall, this study demonstrates that D. sinicus is an effective biological control agent for L. delicatula, with significant potential for further development in the management of this pest.","PeriodicalId":94077,"journal":{"name":"Journal of economic entomology","volume":" ","pages":"1320-1327"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RNAi-mediated knockdown of fruitless in Plutella xylostella (Lepidoptera: Plutellidae) disrupts female sex pheromone biosynthesis and male courtship behavior. rnai介导的小菜蛾（鳞翅目：小菜蛾科）无果性基因敲除干扰了雌性信息素的生物合成和雄性求偶行为。

Journal of economic entomology Pub Date : 2025-06-13 DOI: 10.1093/jee/toaf076

Zizhou Huang, Zheming Liu, Haihao Ma, Yong Zhou, Piao Zhao, Hang Zhu, Jia Liu, Yilong Man, Xiaomao Zhou

{"title":"RNAi-mediated knockdown of fruitless in Plutella xylostella (Lepidoptera: Plutellidae) disrupts female sex pheromone biosynthesis and male courtship behavior.","authors":"Zizhou Huang, Zheming Liu, Haihao Ma, Yong Zhou, Piao Zhao, Hang Zhu, Jia Liu, Yilong Man, Xiaomao Zhou","doi":"10.1093/jee/toaf076","DOIUrl":"10.1093/jee/toaf076","url":null,"abstract":"Strong fecundity is an important reason why the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), has become one of the most serious pests of cruciferous vegetables worldwide. Disrupting with courtship and mating behaviors has emerged as an important strategy for insect management. The fruitless (fru) gene encodes a transcription factor that contains a BTB (Broad-Complex, Tramtrack and Bric a brac) and a zinc finger pair related to the C2H2 class. It plays a crucial role in regulating insect courtship behavior. In this study, the fru gene of P. xylostella (Pxfru) was cloned, revealing 7 alternative splicing forms (Pxfru-1 to Pxfru-7). Pxfru-1 to Pxfru-3 were non-sex-specific transcripts, while the remaining forms were male-specific. Subcellular localization experiments demonstrated that the transcripts encoding proteins containing BTB and zinc finger domains (Pxfru-1 to Pxfru-3) localized to the cell nucleus, whereas Pxfru-4 and Pxfru-5, which contain only one BTB domain, were localized in the nucleus and cytoplasm, respectively. Knockdown the expression of fru in male moths delayed occurrence of mating and reduced their preference to female sex pheromones. Meanwhile, suppression of fru expression in female P. xylostella decreased their attractiveness to males. The results of GC-MS and Y-tube olfaction experiments indicated that this change may be attributed to alterations in the proportion of sex pheromones. This study represents the first report of the fru gene influencing pheromone ratios in female insects, and provides a new perspective for understanding the function of fru in the courtship behavior of non-model insects.","PeriodicalId":94077,"journal":{"name":"Journal of economic entomology","volume":" ","pages":"1407-1418"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144063664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bottom-up effects of nitrogen fertilizer on cotton growth and population expansion of Aphis gossypii (Hemiptera: Aphididae). 氮肥对棉花生长和棉蚜种群扩张的自下而上效应。

Journal of economic entomology Pub Date : 2025-06-13 DOI: 10.1093/jee/toaf080

Yu Gao, Huatong Li, Yanhui Lu

{"title":"Bottom-up effects of nitrogen fertilizer on cotton growth and population expansion of Aphis gossypii (Hemiptera: Aphididae).","authors":"Yu Gao, Huatong Li, Yanhui Lu","doi":"10.1093/jee/toaf080","DOIUrl":"10.1093/jee/toaf080","url":null,"abstract":"Bottom-up effects, triggered by fertilization regimes, can be key ecological forces regulating pest populations. In this study, we investigated the effects of 5 different concentrations of Ca(NO3)2 (0, 2, 4, 6, and 8 mM) on cotton plants and the performance of Aphis gossypii. Our results demonstrated that nitrogen application significantly enhanced the growth indices of cotton seedlings (eg plant height, aboveground fresh weight) and plant biochemistry parameters (eg nitrogen, chlorophyll, and tannin). Nitrogen also affected the life history parameters of A. gossypii (eg longevity, reproductive days, fecundity, intrinsic rate of increase, finite rate of increase, and net reproductive rate). Notably, the positive effects on cotton seedling growth and A. gossypii performance observed at the 6 mM level diminished at the 8 mM level. Additionally, the highest soluble sugar content was observed in the unfertilized plants (the 0 mM treatment). Electrical penetration graph analysis revealed that A. gossypii spent less time on intercellular probing and more time feeding on phloem with increasing nitrogen levels, suggesting improved nutrient acquisition from phloem, which supported the observed increase in fecundity. The above results indicate that the bottom-up effects of nitrogen fertilizer could trigger outbreaks of A. gossypii. These findings provide a scientific basis for optimizing nitrogen fertilizer within integrated pest management programs so as to protect yields, reduce the risk of aphid outbreaks, as well as the costs for labor and ecological environment.","PeriodicalId":94077,"journal":{"name":"Journal of economic entomology","volume":" ","pages":"1225-1234"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144060724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of soil-applied imidacloprid on behavior of Planococcus ficus. 土壤施用吡虫啉对植物扁平球菌行为的影响。

Journal of economic entomology Pub Date : 2025-06-13 DOI: 10.1093/jee/toaf077

Mark S Sisterson, Sean Y Uchima

{"title":"Effects of soil-applied imidacloprid on behavior of Planococcus ficus.","authors":"Mark S Sisterson, Sean Y Uchima","doi":"10.1093/jee/toaf077","DOIUrl":"10.1093/jee/toaf077","url":null,"abstract":"Planococcus ficus threatens grapevine production worldwide. Because mealybugs are protected from contact insecticides by residing under bark, systemic insecticides including the neonicotinoid imidacloprid are frequently used for control. The response of mealybugs to vines treated with soil-applied imidacloprid was assessed in a series of no-choice and choice tests. No-choice tests indicated that crawlers could initially establish on plants treated at all imidacloprid concentrations tested. While all mealybugs on plants treated with the 2 highest concentrations of imidacloprid died prior to maturation, mealybugs completed development and produced viable offspring on plants treated with the lowest concentration. To evaluate the effects of imidacloprid on mature mealybugs, no-choice tests were conducted using mealybug cohorts aged 3 or 4 wk. A single mealybug was allowed to establish on an untreated grapevine. After the mealybug was established, the vine was treated with one of 4 concentrations of soil-applied imidacloprid, and the response was evaluated after 6 d. Treatment concentration had minor effects on the survival of mature mealybugs, with the fecundity of females exposed to the highest concentrations of imidacloprid reduced compared to controls. Choice tests using mealybugs from cohorts aged 3 and 4 wk indicated no preference for treated versus untreated plants. Results indicated that crawlers are more susceptible to imidacloprid than mature mealybugs. Because imidacloprid must be consumed to kill insects, mature mealybugs appear to respond to treatment by feeding less and relying on stored energetic resources.","PeriodicalId":94077,"journal":{"name":"Journal of economic entomology","volume":" ","pages":"1215-1224"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144056461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of imidacloprid application timing on twospotted spider mite (Acari: Tetranychidae) on hop. 吡虫啉施药时机对叶螨科双斑螨的影响。

Journal of economic entomology Pub Date : 2025-06-13 DOI: 10.1093/jee/toaf079

Joanna L Woods, Briana J Richardson, Navneet Kaur, Seth J Dorman, David H Gent

{"title":"Effect of imidacloprid application timing on twospotted spider mite (Acari: Tetranychidae) on hop.","authors":"Joanna L Woods, Briana J Richardson, Navneet Kaur, Seth J Dorman, David H Gent","doi":"10.1093/jee/toaf079","DOIUrl":"10.1093/jee/toaf079","url":null,"abstract":"Imidacloprid and other neonicotinoids have been associated with secondary pest outbreaks of twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae). Imidacloprid is commonly applied in hop for the suppression of various pest organisms. A 3-yr study was conducted in western Oregon to determine the impact of a single foliar application of imidacloprid on twospotted spider mites and their predators in hop when made in mid-May versus mid-June. Applications made in June generally resulted in greater densities of twospotted spider mites as compared to applications made in May or when plants were nontreated, although this effect was year-dependent. Predatory mites (Acari: Phytoseiidae) were present at low levels and seemingly were not impacted by imidacloprid application. Orius spp. (Hemiptera: Anthocoridae), Stethorus spp. (Coleoptera: Coccinellidae), and other macropredators were minimally reduced in one year on 2 dates. Given the small impact on the key predator groups, the mechanisms of imidacloprid-induced secondary outbreak of twospotted spider mite appears to involve factors other than direct toxicity to predators. Practically, avoiding the application of imidacloprid when twospotted spider mite densities are increasing (generally June) should minimize risk of secondary outbreaks of this organism.","PeriodicalId":94077,"journal":{"name":"Journal of economic entomology","volume":" ","pages":"1441-1445"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144056143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of short-term thermal stress on functional response and interspecific interaction of whitefly parasitoids. 短期热胁迫对粉虱寄生蜂功能响应及种间互作的影响。

Journal of economic entomology Pub Date : 2025-06-13 DOI: 10.1093/jee/toaf056

Cuiping Guo, Jiayin Li, Shibo Wu, Xinyuan Yang, Haiyun Xu

{"title":"Effects of short-term thermal stress on functional response and interspecific interaction of whitefly parasitoids.","authors":"Cuiping Guo, Jiayin Li, Shibo Wu, Xinyuan Yang, Haiyun Xu","doi":"10.1093/jee/toaf056","DOIUrl":"10.1093/jee/toaf056","url":null,"abstract":"The functional response of a biocontrol agent, as well as its interactions with co-occurring species under thermal stress, are 2 crucial factors in evaluating its ability to control arthropod pests in the context of climate warming. Encarsia formosa (Gahan) (Hymenoptera: Aphelinidae) is one of the most extensively utilized biological control agents for the whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae). In the present study, we evaluated the effects of short-term heat stress on the functional response and host control efficacy of En. formosa, as well as the interspecific interactions between this parasitoid and the co-occurring parasitoid Eretmocerus hayati (Zolnerowich and Rose) (Hymenoptera: Aphelinidae). At all experimental temperatures, type II functional responses of En. formosa were observed in both parasitism and host feeding. The type of functional response remained unaffected by experimental temperature. Roger's model was utilized to fit the data. Based on the 95% confidence interval, pairwise comparisons of searching rate (a) and handling time (Th) across temperature regimes yielded no significant differences. In most instances, the increased temperatures did not affect the host control efficacy of En. formosa. The coexistence of En. formosa and Er. hayati exhibited a negative impact on En. formosa's parasitism but a positive effect on that of Er. hayati across all temperature regimes. These findings provide valuable knowledge regarding the functional dynamics of En. formosa under climate warming and underscore the importance of understanding interspecific relationships among biocontrol agents to effectively optimize pest management strategies.","PeriodicalId":94077,"journal":{"name":"Journal of economic entomology","volume":" ","pages":"1195-1206"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Entomopathogenic nematodes in pecan orchards in Georgia and their virulence on selected pecan pests. 乔治亚州山核桃园昆虫病原线虫及其对特定山核桃害虫的毒力。

Journal of economic entomology Pub Date : 2025-06-13 DOI: 10.1093/jee/toaf086

Rajendra Acharya, David I Shapiro-Ilan, Apurba K Barman

{"title":"Entomopathogenic nematodes in pecan orchards in Georgia and their virulence on selected pecan pests.","authors":"Rajendra Acharya, David I Shapiro-Ilan, Apurba K Barman","doi":"10.1093/jee/toaf086","DOIUrl":"10.1093/jee/toaf086","url":null,"abstract":"Several insect pests prevalent in pecan orchards cause considerable damage to foliage and nuts, including fall webworm (Hyphantria cunea Drury) (Lepidoptera: Erebidae), walnut caterpillar (Datana integerrima Grote and Robinson) (Lepidoptera: Notodontidae), and nut curculio (Curculio hicoriae) (Coleoptera: Curculionidae). Synthetic insecticides are commonly used to manage these pests. However, developing effective biological control methods is essential to reduce reliance on chemical insecticides and their associated impacts. Entomopathogenic nematodes (EPNs) are effective biocontrol agents used against various lepidopteran and coleopteran pests in different cropping systems. The objectives of the current study were to identify the naturally abundant EPNs in pecan orchards and evaluate their effectiveness against fall webworm, walnut caterpillar, and nut curculio. EPNs were recovered from all sampled orchards. However, 46.43% of the samples were positive for the presence of EPN, which were identified to 5 EPN species, Heterorhabditis indica, H. zealandica, Metarhabditis rainai, Oscheius myriophilus, and Steinernema glaseri. Additionally, the effectiveness of these local EPNs was compared with 2 commercial EPN strains, H. bacteriophora (HP88) and S. carpocapsae (All). Laboratory assays indicated that H. indica and H. zealandica have high virulence against both the larvae and pupae of fall webworm, walnut caterpillar, as well as larvae of nut curculio. In contrast, M. rainai, O. myriophilus, and S. glaseri exhibited low virulence against the larvae of fall webworm and walnut caterpillar. Therefore, H. indica and H. zealandica could be potential biological control agents for managing fall webworm, walnut caterpillar, and nut curculio in pecan orchards.","PeriodicalId":94077,"journal":{"name":"Journal of economic entomology","volume":" ","pages":"1146-1155"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144048550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0