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首页> 外文期刊>Pest Management Science >Stability of neonicotinoid sensitivity in Frankliniella fusca populations found in agroecosystems of the southeastern USA
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Stability of neonicotinoid sensitivity in Frankliniella fusca populations found in agroecosystems of the southeastern USA

机译：美国农产品系统在美国东南部的弗兰克利耳富斯科纳植物中的新霉素敏感性

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BACKGROUND Insecticide resistance arises at a given location in response to selection acting on novel genotypes or standing variation, or allelic migration. Fitness costs of resistance may slow resistance evolution or result in reversion to susceptibility, but consistent and geographically widespread use of insecticides may provide sufficient selection to offset the fitness costs of resistance. Understanding this relationship is important to the success of insecticide resistance management. We report the existence of fitness costs of neonicotinoid resistance in field-collected populations of the tobacco thrips (Frankliniella fusca), which increasingly challenge upland cotton production in the southeastern USA. RESULTS Populations (14 of 15 in 2015; 4 of 5 in 2016) investigated showed a loss of resistance to imidacloprid after multiple generations without exposure to the insecticide. Populations studied in 2016 were each split into two colonies, and one of each pair was repeatedly exposed to imidacloprid. In three of the four populations that lost resistance, imidacloprid-exposed colonies lost resistance significantly more slowly than did corresponding unexposed colonies. CONCLUSION For imidacloprid resistance to be broadly increasing in the landscapes of the southeastern USA despite fitness costs of resistance, selection for resistance must be sufficient to overcome the costs. Findings encourage investigation into why costs are overcome in this system, potentially including geographic extent of neonicotinoid use or prevalence of low-dose exposure. (c) 2019 Society of Chemical Industry
机译：背景技术杀虫剂抗性在给定的位置产生响应于作用于新型基因型或站立变异的选择或等位基因迁移。抵抗力的健身成本可能会降低抵抗力或导致易感性的恢复，但是一致的和地理上广泛使用杀虫剂可以提供足够的选择来抵消抵抗的健身成本。了解这种关系对于杀虫剂抵抗管理的成功对成功非常重要。我们报告了烟草蓟马（Frankliniella Fusca）的现场收集群体的新烟白抗性的健身成本存在，这越来越多地挑战了美国东南部的高地棉花生产。结果人口（2015年的15个，共有15人; 2016年4分）调查显示，在多一代后，在不暴露于杀虫剂的情况下，对吡虫啉的抗性丧失。 2016年研究的种群分裂成两个菌落，每对中的一个被反复暴露于吡虫啉。在抗抵抗力的四种群体中，胰岛酰上暴露的菌落失去了抗性比相应的未曝光菌落更慢。结论为胰岛素抗性耐胰岛素抗性，尽管抵抗力的健身成本，但抵抗的选择必须足以克服成本。调查结果鼓励调查在该系统中克服成本的原因，可能包括新烟碱蛋白使用的地理范围或低剂量暴露的患病率。 （c）2019年化学工业协会

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