Environmental Entomology最新文献_第9页

Photoperiod response influences both voltinism and impact in a biological control agent: comparing six sources of the loosestrife leaf beetle (Galerucella calmariensis) in a common environment. 光周期响应影响生物防治剂的挥发性和影响：在共同环境中比较六种来源的松叶甲虫（Galerucella calmariensis）。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf106

Fritzi S Grevstad, Tyson Wepprich

{"title":"Photoperiod response influences both voltinism and impact in a biological control agent: comparing six sources of the loosestrife leaf beetle (Galerucella calmariensis) in a common environment.","authors":"Fritzi S Grevstad, Tyson Wepprich","doi":"10.1093/ee/nvaf106","DOIUrl":"10.1093/ee/nvaf106","url":null,"abstract":"Multivoltine insects, those having more than one generation per year, often use daylength as a cue for terminating reproduction and entering diapause prior to the onset of winter. In a common garden experiment in Corvallis, Oregon, USA (44.6°), we compared voltinism and impacts of the loosestrife leaf beetle Galerucella calmariensis, a classical biological control agent for the wetland weed purple loosestrife (Lythrum salicaria), sourced from 6 locations in their introduced range (39.4 to 48.8° N). The populations were known to have diverged in their critical daylength for diapause since introduction in 1992. After rearing the populations in similar conditions for a generation, and overwintering the adult beetles outdoors, we followed cohorts of eggs on size-matched potted plants as they developed with natural timing through 2 generations in a randomized complete block design. Adult beetles from both the first and second generations were sampled to determine their reproductive status and voltinism. We harvested, dried, and weighed inflorescences and roots of the plants to measure agent impact. The 6 beetle populations were found to differ significantly in both voltinism and impacts, with a higher voltinism corresponding with greater impact. We also showed that voltinism in the introduced location was, to some extent, predictable based on laboratory determined photoperiod response curves, but other factors including plant quality also appeared to be influential. These results show that the efficacy of a biological control agent varies by geographic source and that this can be at least partially predicted by the population's diapause response to photoperiod.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1187-1195"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145343899","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

Co-occurrence between 2 egg parasitoids of Dalbulus maidis (Hemiptera: Cicadellidae) under field conditions: host-finding efficiency and observed parasitism. 田间条件下2种寄生蜂的共寄生：寄主效率及寄生观察。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf109

Gustavo Moya-Raygoza, Alejandro Muñoz-Urias

{"title":"Co-occurrence between 2 egg parasitoids of Dalbulus maidis (Hemiptera: Cicadellidae) under field conditions: host-finding efficiency and observed parasitism.","authors":"Gustavo Moya-Raygoza, Alejandro Muñoz-Urias","doi":"10.1093/ee/nvaf109","DOIUrl":"10.1093/ee/nvaf109","url":null,"abstract":"Little is known about the interaction between different egg parasitoid species parasitizing a single host species, under field conditions. In a 2-yr study, we investigated the efficiency of finding and parasitism of eggs of Dalbulus maidis (DeLong) (Hemiptera: Cicadellidae) by the egg parasitoids Anagrus virlai Triapitsyn (Hymenoptera: Mymaridae) and Paracentrobia subflava (Girault) (Hymenoptera: Trichogrammatidae) in maize fields. Host-finding efficiency was compared in fields of plants that differed in age, and on maize edges versus within the maize fields. Then, host-finding and parasitism during short (1 d) versus long (5 d) exposure periods were compared. Anagrus virlai and P. subflava showed similar, highly efficient host searching of maize leaves baited with D. maidis eggs, with similar efficiency in maize crops of different ages. Host-finding was higher, however, in the maize edges than within the maize field. With regard to speed of finding, whereas both parasitoid species were able to search and parasitize D. maidis eggs (at similar levels) when given 5 d of exposure, only P. subflava was able to find and parasitize D. maidis eggs within 24 h. Host-finding of D. maidis eggs was independent between A. virlai and P. subflava when both species parasitized on a single maize leaf. These results suggest that co-occurrence of both parasitoid species is facilitated because each species finds host eggs at different times, parasitoids adults emerge at different times, and a high quantity of host eggs is available.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1155-1162"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145344325","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

Evaluation of pepper cultivars with different heat units on the feeding preference of pepper weevil (Coleoptera: Curculionidae). 不同热单位辣椒品种对辣椒象鼻虫取食偏好的评价。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf098

Nagamani Kanchupati, Garima Garima, Dakshina Seal, Bruce Schaffer, Oscar Liburd

{"title":"Evaluation of pepper cultivars with different heat units on the feeding preference of pepper weevil (Coleoptera: Curculionidae).","authors":"Nagamani Kanchupati, Garima Garima, Dakshina Seal, Bruce Schaffer, Oscar Liburd","doi":"10.1093/ee/nvaf098","DOIUrl":"10.1093/ee/nvaf098","url":null,"abstract":"Pepper weevil, Anthonomus eugenii Cano, is a devastating pest of pepper that is typically controlled, to varying degrees, with chemical insecticides. Additional tools are needed to manage this pest, including host plant resistance. Field and laboratory studies were conducted over 4 yr to determine pepper weevil preferences for pepper hosts with different Scoville heat units (SHU): bell (0 SHU), jalapeño (2,500 to 8,000 SHU), habanero (100,000 to 350,000 SHU), ghost (855,000 to 1,041,427 SHU), and scorpion (1,200,000 to 2,000,000 SHU) peppers. In field trials, jalapeño had the highest number of weevil-infested fruit, and ghost pepper had the lowest. The number of adult weevils on the foliage was highest in jalapeño (0.94 ± 0.23) and lowest in ghost pepper (0.11 ± 0.05). The density of the weevils inside infested fruit was highest on jalapeño and lowest in scorpion pepper. Laboratory olfactometer tests documented a higher preference of adult weevils for bell and jalapeño followed by habanero, ghost, and scorpion peppers. Differences in plant height and width among hosts were not correlated with weevil infestation level. Pepper weevil host preference appears inversely related to pepper hotness (SHU), as bell and jalapeño peppers, the hosts with the lowest SHUs, were the most susceptible to weevil infestation. The greater weevil susceptibility of jalapeño and bell pepper than other species/cultivars may be related to the fact that jalapeño and bell pepper and the weevil co-evolved in Mexico. This study could help in the selection of resistant pepper species for managing pepper weevil.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1375-1385"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145344263","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

Impact of environmental factors on pest population using multivariate cointegration model: evidence from India. 利用多变量协整模型分析环境因素对有害生物种群的影响：来自印度的证据。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf114

Himadri Shekhar Roy, Ranjit Kumar Paul, Md Yeasin, Kanchan Sinha, Prakash Kumar, S Vennila, Mathyam Prabhakar, Amrit Kumar Paul

{"title":"Impact of environmental factors on pest population using multivariate cointegration model: evidence from India.","authors":"Himadri Shekhar Roy, Ranjit Kumar Paul, Md Yeasin, Kanchan Sinha, Prakash Kumar, S Vennila, Mathyam Prabhakar, Amrit Kumar Paul","doi":"10.1093/ee/nvaf114","DOIUrl":"10.1093/ee/nvaf114","url":null,"abstract":"One of the main challenges in improving agricultural productivity is the prevalence of pests and diseases, which are highly sensitive to extreme weather conditions. The interaction between weather patterns and pest infestations significantly affects crop yield. Traditional statistical methods often struggle to capture the complex temporal and geographical dynamics of these interactions. However, employing multivariate cointegration has proven valuable for estimating such interactions and quantifying the extent to which various environmental conditions influence pest populations. The study further investigated impulse response functions, which revealed substantial impacts of temperature and relative humidity on pest populations through unit standard deviation shocks to endogenous variables. Specifically, this research examined the dynamic causal relationships between major pest occurrences and environmental variables in 3 groundnut-growing states of India-Andhra Pradesh, Gujarat, and Tamil Nadu, using cointegration and Vector Error Correction Model techniques. The analysis incorporated key environmental variables, including temperature, relative humidity, and rainfall. Results from the Johansen test indicated a strong long-term equilibrium relationship between pest populations and climatic conditions, confirming the presence of at least one cointegrating vector at the 5% significance level. Granger causality tests further revealed that temperature and relative humidity had a unidirectional causal influence on the pest occurrence. Additionally, impulse response analysis further revealed that shocks to temperature and relative humidity produced significant and persistent effects on pest incidence over time.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1445-1456"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145539758","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

Correction. 修正。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf116

引用次数: 0

The defoliating biological control agent, Lygomusotima stria (Lepidoptera: Crambidae), reduces rachis and fiddlehead production in Lygodium microphyllum (Schizaeales: Lygodiaceae). 落叶生物防治剂Lygomusotima stria（鳞翅目：蛾虻科）可减少小叶Lygodium lygolum （Schizaeales: Lygodiaceae）的轴和芦苇头产量。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf084

Gregory S Wheeler, Stephanie Ripsom

{"title":"The defoliating biological control agent, Lygomusotima stria (Lepidoptera: Crambidae), reduces rachis and fiddlehead production in Lygodium microphyllum (Schizaeales: Lygodiaceae).","authors":"Gregory S Wheeler, Stephanie Ripsom","doi":"10.1093/ee/nvaf084","DOIUrl":"10.1093/ee/nvaf084","url":null,"abstract":"Old World climbing fern, Lygodium microphyllum (Cav.) R. Br., is one of the worst invasive weeds of natural areas of southern and central Florida, United States. The climbing fern forms thick mats that shade native shrubs and trees. Old World climbing fern invades the southern peninsula of Florida, where cost-effective, sustainable control methods are needed. Here, we report the results of greenhouse studies that examined the performance of Lygomusotima stria Solis & Yen larvae, a potential biological control agent of L. microphyllum. We examined the impact of larval feeding on the target weed when grown at a range of fertilizer and herbivore levels. Furthermore, we applied these treatments to guide post-release mass rearing protocols. The results indicate that larvae had greater survival when fed plants at the highest fertilizer level. Two generations of feeding by L. stria larvae decreased rachis weights at the lowest fertilizer levels and fiddlehead numbers. At higher fertilizer conditions, the plants were able to tolerate L. stria herbivory, resulting in no significant changes in plant tissue allocations. The increased larval survival when fed plants grown at high fertilizer levels will benefit both laboratory and field mass production of agents. By impacting rachises and fiddleheads, these results suggest this insect will impede the ability of L. microphyllum to climb substrates, especially in lower resource conditions.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1171-1178"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145091331","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

Assessing landfill wastes as a sustainable feeding substrate for black soldier fly larvae. 评价垃圾填埋场废物作为黑兵蝇幼虫的可持续取食基质。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf079

Natasha Azmi Nur-Aliah, Tania Ivorra, Meisam Tabatabaei, Hannis Fadzillah Mohsin, Chong Chin Heo

{"title":"Assessing landfill wastes as a sustainable feeding substrate for black soldier fly larvae.","authors":"Natasha Azmi Nur-Aliah, Tania Ivorra, Meisam Tabatabaei, Hannis Fadzillah Mohsin, Chong Chin Heo","doi":"10.1093/ee/nvaf079","DOIUrl":"10.1093/ee/nvaf079","url":null,"abstract":"The rapid growth of the global population has led to an alarming increase in waste generation, with landfills continuing to serve as the primary waste management solution in many developing countries. This surge in solid waste accumulation is putting immense pressure on landfill capacities, underscoring the urgent need for innovative waste management strategies, especially in regions still heavily dependent on traditional systems. This study investigates the potential of black soldier fly larvae to process 3 distinct types of landfill waste: food waste, aged landfill waste, and municipal solid waste sludge. Neonate larvae (0-1-day-old) were applied to 2.5 ± 0.02 kg of waste to assess key performance metrics, including waste reduction (% dry matter), survival rate (%), bioconversion rate (% dry matter), and waste conversion efficiency (% dry matter). The results revealed that black soldier fly larvae effectively reduced waste by 41.6-55.8%. However, across all treatment groups, the larvae exhibited low efficiency in converting waste into biomass. Notably, while performance comparisons with the control feed (commercial chicken feed) yielded predominantly adverse outcomes, the fresh waste treatment showed a marginally positive impact on waste reduction. These findings highlight the potential of black soldier fly larvae in landfill waste management while also identifying significant limitations in bioconversion efficiency. To optimize the application of black soldier fly larvae in sustainable waste management practices, further research is warranted to explore innovative pretreatment methods and other factors that could enhance their efficacy in biomass production.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1240-1248"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144991762","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

Host morphs, population density, and symbiont status shape parasitism success of Aphelinus asychis (Hymenoptera: Aphelinidae) in Acyrthosiphon pisum (Hemiptera: Aphididae). 寄主形态、种群密度和共生体状态影响蚜蝇（膜翅目：蚜蜂科）对蚜蝇（半翅目：蚜蜂科）的寄生成功率。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf103

Yang Li, Shin-Ichi Akimoto, Qing Ru, Wen-Min Shi

{"title":"Host morphs, population density, and symbiont status shape parasitism success of Aphelinus asychis (Hymenoptera: Aphelinidae) in Acyrthosiphon pisum (Hemiptera: Aphididae).","authors":"Yang Li, Shin-Ichi Akimoto, Qing Ru, Wen-Min Shi","doi":"10.1093/ee/nvaf103","DOIUrl":"10.1093/ee/nvaf103","url":null,"abstract":"The parasitoid wasp Aphelinus asychis Walker (Hymenoptera: Aphelinidae) has been shown to effectively control parthenogenetic Acyrthosiphon pisum Harris (Hemiptera: Aphididae) populations. However, its effectiveness against the sexual generation of aphids remains unclear. Additionally, secondary symbionts in aphids, such as Hamiltonella defensa and Regiella insecticola (both Enterobacterales: Enterobacteriaceae), may influence parasitoid success. This study investigated the parasitism performances of A. asychis among third-instar oviparous female, male, and viviparous females of A. pisum, as well as the effects of aphid density, parasitoid density, and aphid symbiont infections on parasitoid emergence and aphid mortality. The results showed that A. asychis exhibited high parasitism performance on third-instar male aphids, with parasitoid emergence and host mortality that were significantly greater than in viviparous and oviparous females. Increasing aphid density initially enhanced parasitoid emergence per-female, but efficacy plateaued at higher aphid densities, likely due to superparasitism and larval competition. Moreover, higher parasitoid densities increased aphid mortality but reduced per-female parasitoid emergence. Symbiont infection significantly reduced parasitoid success. Aphids uninfected with symbionts exhibited the highest parasitoid emergence, followed by those infected singly with H. defensa. Aphids singly infected with R. insecticola or co-infected exhibited the lowest parasitoid emergence. No additive protective effect was detected in aphids co-infected with H. defensa and R. insecticola, potentially due to shared defense mechanisms, a lack of synergistic benefits between coexisting symbionts, or competitive interactions. Our findings highlight the need to integrate knowledge of aphid reproductive biology, parasitoid behavior, and symbiont-mediated defenses to optimize biological control strategies targeting A. pisum.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1145-1154"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145257780","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

Effects of a heat wave event on the chemical ecology of species interactions in the potato agroecosystem. 热浪事件对马铃薯农业生态系统物种相互作用化学生态学的影响。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf104

Alma Nalleli Carvajal-Acosta, Joshua S Snook, Zsofia Szendrei, William C Wetzel

{"title":"Effects of a heat wave event on the chemical ecology of species interactions in the potato agroecosystem.","authors":"Alma Nalleli Carvajal-Acosta, Joshua S Snook, Zsofia Szendrei, William C Wetzel","doi":"10.1093/ee/nvaf104","DOIUrl":"10.1093/ee/nvaf104","url":null,"abstract":"Heat waves, brief periods of unusually high temperatures, are increasing in frequency and intensity globally. Such extreme weather events can alter plant chemistry, disrupting species interactions that contribute to pest suppression or increase their performance. Yet, most heat wave studies focus on pairwise interactions, leaving us with a poor understanding of how complex agroecosystems respond to temperature extremes. We addressed this knowledge gap by simulating an experimental heat wave in the field on potato plants (Solanum tuberosum L.) and the Colorado potato beetle, Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae), in the presence or absence of their mutualistic microbial symbionts and another pest, the potato aphid (Macrosiphum euphorbiae (Thomas)). We assessed beetle performance alongside changes in volatile organic compounds (VOCs) and glycoalkaloids from host plants. Beetle performance declined in the absence of their microbial symbionts and under aphid competition, but this effect was reversed under heat wave conditions. These results corresponded with a downregulation in glycoalkaloids, suggesting that potato prioritizes heat stress response over herbivore attack by divesting resources from the production of defensive compounds. The heat wave strongly affected VOCs composition, reducing emissions of multiple compounds while increasing others, but these changes were not directly linked with CPB performance. Overall, our results demonstrate that heat wave effects on crop-pest dynamics are dependent on the agroecological context and mediated by specialized metabolites. Importantly, under dual herbivore pressure, potato crops appear to prioritize coping with heat over defending against pests, underscoring the urgent need for pest management strategies that account for extreme climate events.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1196-1206"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145376487","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

Feed-through insecticides for pest fly management on beef cattle pastures: impacts on dung-inhabiting Coleoptera. 肉牛牧场喂入式杀虫剂对蝇类的影响。

IF 1.5 3区农林科学

Environmental Entomology Pub Date : 2025-12-01 DOI: 10.1093/ee/nvaf089

Kenneth Wise, Bryony Sands, Hannah Tolz

{"title":"Feed-through insecticides for pest fly management on beef cattle pastures: impacts on dung-inhabiting Coleoptera.","authors":"Kenneth Wise, Bryony Sands, Hannah Tolz","doi":"10.1093/ee/nvaf089","DOIUrl":"10.1093/ee/nvaf089","url":null,"abstract":"Dung-breeding flies of pastured cattle have substantial economic impacts on livestock production. To prevent losses, many producers use insecticidal fly treatments which have off-target impacts on beneficial pasture insects such as coprophagous and predatory dung-inhabiting beetles. These insects suppress pasture pest fly populations either through resource competition or direct predation of fly eggs and larvae in the dung. Feed-through insecticides such as insect growth regulators (IGRs) are thought to have fewer harmful off-target impacts because they target immature fly stages in the dung. However, impacts on the larval development of dung beetles are not well understood. The aim of this study was to analyze dung beetle and pest fly populations on grazing beef farms using feed-through insecticides for pest fly management. Between May and September in 2022 and 2024, populations of horn flies, face flies, and stable flies were counted on cattle, and dung-inhabiting Coleoptera populations were surveyed on pastures. The abundance and diversity of dung beetles (Scarabaeidae: Onthophagus and Aphodius spp.) and the abundance of predatory dung insects (Hydrophilidae and Staphylinidae) were significantly lower on farms using feed-through insecticides compared to farms not treating. Horn fly populations rarely exceeded economic thresholds without the use of feed-through insecticides, implying treatment was unnecessary. Face fly populations mostly exceeded economic thresholds even on farms using feed-through insecticides-indicating treatments were not adequately controlling their populations. The use of feed-through insecticides over the whole season is therefore not an integrated approach to controlling flies on pastures and puts other beneficial organisms in the pasture agroecosystem at risk.","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"1249-1260"},"PeriodicalIF":1.5,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145102758","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