{"title":"Sublethal effects of fenoxycarb on female reproduction in <i>Helicoverpa armigera</i> (Lepidoptera: Noctuidae)","authors":"Abouzar Izadpanah, Azam Mikani, Saeid Moharramipour","doi":"10.4039/tce.2023.18","DOIUrl":null,"url":null,"abstract":"Abstract The cotton bollworm, Helicoverpa armigera (Hünber) (Lepidoptera: Noctuidae), is a polyphagous pest that causes severe damage to economical crops in most parts of the world. The juvenile hormone analogues are a group of insect growth regulators that increase larval ages and disrupt larval development. Moreover, they affect reproductive system in adult insects. In this study, the effects of sublethal doses of fenoxycarb on fecundity, fertility, and longevity parameters, as well as on oocyte size, ecdysteroid titer in ovaries, and expression level of the ultraspiracle ( USP ), ecdysone receptor ( EcR ), hormone receptor 3 ( HR 3), and vitellogenin ( Vg ) genes in adult female H. armigera , were examined. Feeding on artificial diet containing fenoxycarb (LC10 and LC25) significantly decreased the percentage of larval survival rate, pupation rate, pupal weight, fecundity, fertility, and oviposition period. It also clearly shortened female longevity. Fenoxycarb treatment suppressed the expression of the USP , EcR , and Vg genes in H. armigera but had no effect on the HR 3 gene expression level in either pupae or adults. Overall, our results show that using fenoxycarb as a juvenile hormone analogue can reduce reproduction in H. armigera and may work as an alternative to the use of insecticides for controlling this important agricultural pest.","PeriodicalId":55289,"journal":{"name":"Canadian Entomologist","volume":"68 1","pages":"0"},"PeriodicalIF":1.1000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Canadian Entomologist","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4039/tce.2023.18","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENTOMOLOGY","Score":null,"Total":0}
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Abstract
Abstract The cotton bollworm, Helicoverpa armigera (Hünber) (Lepidoptera: Noctuidae), is a polyphagous pest that causes severe damage to economical crops in most parts of the world. The juvenile hormone analogues are a group of insect growth regulators that increase larval ages and disrupt larval development. Moreover, they affect reproductive system in adult insects. In this study, the effects of sublethal doses of fenoxycarb on fecundity, fertility, and longevity parameters, as well as on oocyte size, ecdysteroid titer in ovaries, and expression level of the ultraspiracle ( USP ), ecdysone receptor ( EcR ), hormone receptor 3 ( HR 3), and vitellogenin ( Vg ) genes in adult female H. armigera , were examined. Feeding on artificial diet containing fenoxycarb (LC10 and LC25) significantly decreased the percentage of larval survival rate, pupation rate, pupal weight, fecundity, fertility, and oviposition period. It also clearly shortened female longevity. Fenoxycarb treatment suppressed the expression of the USP , EcR , and Vg genes in H. armigera but had no effect on the HR 3 gene expression level in either pupae or adults. Overall, our results show that using fenoxycarb as a juvenile hormone analogue can reduce reproduction in H. armigera and may work as an alternative to the use of insecticides for controlling this important agricultural pest.
摘要棉铃虫(Helicoverpa armigera, h nber)(鳞翅目:夜蛾科)是一种多食性害虫，在世界大部分地区对经济作物造成严重危害。幼虫激素类似物是一组昆虫生长调节剂，可以增加幼虫的年龄，破坏幼虫的发育。此外，它们还影响成虫的生殖系统。在这项研究中，研究了亚致死剂量的苯醚威对成年雌性棉铃虫的生殖力、生育力和寿命参数的影响，以及对卵母细胞大小、卵巢外泌激素滴度、超囊泡(USP)、外泌激素受体(EcR)、激素受体3 (hr3)和卵黄蛋白原(Vg)基因表达水平的影响。饲喂含有芬虫威(LC10和LC25)的人工饲料显著降低了幼虫成活率、化蛹率、蛹重、繁殖力、育性和产卵期。它也明显缩短了女性的寿命。苯醚威抑制了棉铃虫体内USP、EcR和Vg基因的表达，但对棉铃虫蛹和成虫体内hr3基因的表达水平没有影响。总之，我们的研究结果表明，使用苯醚威作为幼虫激素类似物可以减少棉铃虫的繁殖，并可能作为使用杀虫剂的替代品来控制这一重要的农业害虫。
期刊介绍：
French translation follows/le français suit Published since 1868, this peer-reviewed bimonthly publication is the official journal of the Entomological Society of Canada. Available via the internet and with hardcopy distribution to 55 countries, its research papers and notes are relevant to entomologists and other biologists around the world. In addition to being a venue for topical reviews and forum discussion, The Canadian Entomologist publishes current research in all facets of entomology, including systematics and morphology, molecular and developmental biology, ecology and behaviour, biodiversity and evolution, insect management, entomological techniques, and other relevant subject areas. Contributions are published in English or French. Authors will not pay page charges, and will experience fast, high quality reviews of their papers.Publiée depuis 1868, cette publication bimestrielle avec comité de lecture est la revue officielle de la Société d’entomologie du Canada. Disponible sur Internet et distribuée en format papier dans 55 pays, ses articles de recherche et ses notes sont pertinents pour les entomologistes et autres biologistes de par le monde. En plus d’être une plate-forme pour des revues thématiques et un forum de discussion, The Canadian Entomologist publie la recherche actuelle sur toutes les facettes de l’entomologie, incluant la systématique et la morphologie, la biologie moléculaire et développementale, l’écologie et le comportement, la biodiversité et l’évolution, la gestion des insectes, les techniques entomologiques et d’autres domaines pertinents. Les contributions sont publiées en français ou en anglais. Les auteurs ne paient aucun frais de publication, et recevront une révision rapide et de grande qualité de leurs articles.
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