Chen Jin-Cui, Wang Ze-Hua, Cao Li-Jun, Gong Ya-Jun, Hoffmann Ary A, Wei Shu-Jun
Institute of Plant and Environmental Protection, Beijing Academy of Agriculture and Forestry Sciences, 100097, Beijing, China.
School of BioSciences, Bio21 Institute, The University of Melbourne, Melbourne, VIC, 3010, Australia.
Ecotoxicology. 2018 Aug;27(6):742-751. doi: 10.1007/s10646-018-1956-y. Epub 2018 Jun 28.
Chemical control is important in the management of the tobacco whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae). Susceptibility of B. tabaci to insecticides may vary among different developmental stages and geographical populations. In this study, we examined toxicity of seven commonly-used insecticides to B. tabaci MED in four field populations from China. Avermectin has high level of toxicity to all stages of B. tabaci MED in all four populations. Cyantraniliprole and sulfoxaflor have high toxicity to adults. Spirotetramat, cyantraniliprole and flonicamid have high toxicity to nymphs but not adults. Acetamiprid, cyantraniliprole and sulfoxaflor have high toxicity to eggs. However, the relative toxicity of B. tabaci MED to these chemicals varied across different populations, with little consistency in population differences across developmental stages. Our findings together with some instances where LC values were higher than field recommended dosages indicate field-evolved resistance to insecticides (such as thiamethoxam and sulfoxaflor) and stage-specific mechanisms that will influence effective control of B. tabaci MED by insecticides.
化学防治在烟粉虱Bemisia tabaci（Gennadius）（半翅目：粉虱科）的管理中很重要。烟粉虱对杀虫剂的敏感性可能因不同发育阶段和地理种群而异。在本研究中，我们检测了七种常用杀虫剂对来自中国的四个田间种群的烟粉虱MED型的毒性。阿维菌素对所有四个种群的烟粉虱MED型的各个阶段都具有高毒性。氰虫酰胺和氟啶虫胺腈对成虫具有高毒性。螺虫乙酯、氰虫酰胺和氟吡呋喃酮对若虫具有高毒性，但对成虫无高毒性。啶虫脒、氰虫酰胺和氟啶虫胺腈对卵具有高毒性。然而，烟粉虱MED型对这些化学药剂的相对毒性在不同种群间有所不同，不同发育阶段的种群差异几乎没有一致性。我们的研究结果以及一些LC值高于田间推荐剂量的情况表明，烟粉虱对杀虫剂（如噻虫嗪和氟啶虫胺腈）已产生田间进化抗性，以及会影响杀虫剂对烟粉虱MED型进行有效防治的阶段特异性机制。
