Field‐evolved resistance to nitenpyram is associated with fitness costs in whitefly

作者：Han-Tang Lu, Buli Fu, Qimei Tan, Jinyu Hu, Jing Yang, Xuegao Wei, Jinjin Liang, Chao Wang, Yao Ji, Mingjiao Huang, Hu Xue, He Du, Rong Zhang, Tianhua Du, Chao He, Xin Yang, Youjun Zhang · 发表于：Pest Management Science · 年份：2024 · DOI：10.1002/ps.8286 · 被引用次数：11 · 研究领域：Insect and Pesticide Research、Insect-Plant Interactions and Control、Insect symbiosis and bacterial influences

Abstract BACKGROUND Elucidating fitness cost associated with field‐evolved insect resistance to insecticide is of particular importance to current sustainable pest control. The global pest whitefly Bemisia tabaci has developed resistance to many members of neonicotinoids, but little is known about whitefly resistance to neonicotinoid nitenpyram and its associated fitness cost. Using insecticide bioassay and life‐table approach, this study aims to investigate nitenpyram resistance status in field‐collected whitefly populations, and to explore whether such resistance is accompanied by a fitness cost. RESULTS The bioassay results revealed that 14 of 29 whitefly populations displayed moderate to extremely high resistance to nitenpyram, demonstrating a widespread field‐evolved resistance to nitenpyram. This field‐evolved resistance in the whitefly has increased gradually over the past 3 years from 2021 to 2023. Further life‐table study showed that two resistant whitefly populations exhibited longer developmental time, shorter lifespans of adult, and lower fecundity compared with the most susceptible population. The relative fitness cost of the two resistant populations was calculated as 0.69 and 0.56 by using net productive rate R 0 , which suggests that nitenpyram resistance comes with fitness cost in the whitefly, especially on reproduction. CONCLUSION Overall, these results represent field‐evolved high resistance to nitenpyram in the whitefly. The existing fitness costs associa...