BACKGROUNDThe citrus red mite, Panonychus citri is a serious pest of the citrus industry and has developed resistance to many acaricides. Broflanilide is a novel meta‐diamide insecticide that binds to a new site on the γ ‐aminobutyric acid receptor with high potency against pests. However, little information has been reported about its effect on the citrus red mite.RESULTSBroflanilide exhibited higher toxicity to female adults and eggs of a laboratory strain of P. citri The median lethal concentration (LC50), 9.769 mg/L and 4.576 mg/L, respectively) than other commonly used acaricides and was also toxic to two P. citri field strains. Broflanilide treatment with LC10, LC20, and LC30 significantly decreased the fecundity and longevity of female adults of F0 P. citri compared with the control. The duration of larva, protonymph, deutonymph and adult, and total life span in the F1 generation were significantly reduced after treatment of F0 with broflanilide. Population parameters, including the intrinsic rate of increase (r) and finite rate of increase (λ), were significantly increased, and the mean generation time (T) of F1 progeny was significantly reduced in the LC20 treatment. The predicted population size of F1 increased when parental female adults were treated with sublethal concentrations.CONCLUSIONBroflanilide had high acaricidal activity toward P. citri, and exposure to a sublethal concentration significantly inhibited the population growth of F0. The transgenerational hormesis effect is likely to cause population expansion of F1. More attention should be paid when broflanilide is applied to control P. citri in citrus orchards. © 2024 Society of Chemical Industry.

中文翻译：

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溴苯胺对柑橘红螨的亚致死和跨代影响


背景技术柑橘红螨（Panonychus citri）是柑橘业的严重害虫，并且已对多种杀螨剂产生抗性。 Broflanilide 是一种新型间二酰胺杀虫剂，可与 γ-氨基丁酸受体上的新位点结合，对害虫具有高效力。然而，其对柑橘红螨的作用却鲜有报道。 结果溴苯苯胺对实验室菌株柑橘红螨的雌成虫和卵表现出较高的毒性，半数致死浓度（LC50）分别为9.769 mg/L和4.576 mg/L。 ，分别）比其他常用杀螨剂高，并且对两种柑橘疫霉田间菌株也有毒。与对照相比，用 LC10、LC20 和 LC30 处理 Broflanilide 显着降低了 F0 柑橘 P. citri 雌性成虫的繁殖力和寿命。用溴苯苯胺处理 F0 后，F1 代幼虫、原若虫、后若虫和成虫的持续时间以及总寿命显着缩短。在LC20处理中，群体参数，包括内在增长率（r）和有限增长率（λ）显着增加，并且F1后代的平均世代时间（T）显着缩短。当亲本雌性成虫经亚致死浓度处理时，预测的F1种群数量增加。结论溴苯苯胺对柑橘小叶螨具有较高的杀螨活性，亚致死浓度显着抑制F0种群的增长。跨代毒物兴奋效应很可能导致F1的种群扩张。柑橘园施用溴苯胺防治柑橘小叶蛾时应注意。 © 2024 化学工业协会。