背景:柑橘红螨,Panonychuscitri(McGregor)是一种全球分布的农业害虫。迟到了,对普通杀螨剂的抗性引起了人们的关注,即对柑橘的化学控制是一种低效的控制手段。Fluralaner,一种剧毒的异恶唑啉杀虫剂,用于治疗各种外寄生虫,提出了一个潜在的替代方案。然而,关于fluralaner对柑橘红螨的影响的报道很少。本研究旨在评估毒性,fluralaner对P.citri的亚致死和跨代作用。
结果:在实验室和野外种群中,我们发现fluralaner比常规替代品毒性更大,包括甲氰菊酯,bifenazate,偶氮环素,还有毒死蜱.有趣的是,fluralaner被证明对女性成年人的毒性比对P.citri的卵更大,LC50为2.446和122.7mg/L,分别。暴露于浓度的fluralaner(LC10,LC20,和LC30)显着降低了成年女性的繁殖力和寿命。尽管应用于父母成年女性(F0)的fluralaner浓度会导致发育参数发生一些变化,F1代的大多数生命表参数或种群增长没有显着变化。
结论:我们的结果表明,fluralaner对P.citri具有高毒性,对F0的显着亚致死效应可以抑制柑橘的种群增长,但不是F1。Fluralaner可被视为未来管理柑橘红螨的农药。
BACKGROUND: The citrus red mite, Panonychus citri (McGregor) is a globally distributed agricultural pest. Of late, resistance to common acaricides has raised concerns that chemical control of P. citri is an inefficient means of control. Fluralaner, a highly toxic isoxazoline insecticide used to treat various ectoparasites, presents one potential alternative. However, little information has been reported about the effect of fluralaner on the citrus red mite. This study aims to evaluate the toxicity, sublethal and transgenerational effects of fluralaner on P. citri.
RESULTS: In both laboratory and field populations of P. citri, we found fluralaner to be more toxic than conventional alternatives, including fenpropathrin, bifenazate, azocyclotin and chlorpyrifos. Interestingly, fluralaner proved more toxic to female adults than to the eggs of P. citri, with median lethal concentrations (LC50) of 2.446 and 122.7 mg L-1, respectively. Exposure to sublethal concentrations of fluralaner (LC10, LC20 and LC30) significantly reduced the fecundity and longevity of female adults P. citri individuals. Although concentrations of fluralaner applied to the parental female adults (F0) led to some changes in the developmental parameters, there were no significant changes in most of the life table parameters or population growth of the F1 generation.
CONCLUSIONS: Our results indicate that fluralaner is highly toxic to P. citri, and a significant sublethal effect on F0 could suppress the population growth of P. citri, but not for F1. Fluralaner may be considered as a pesticide for the future management of the citrus red mite. © 2024 Society of Chemical Industry.