Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, PR China.
J Econ Entomol. 2013 Apr;106(2):970-8. doi: 10.1603/ec12434.
The oriental fruit fly, Bactrocera dorsalis (Hendel), is a serious insect pest that causes large losses to orchards globally. In this study, we conducted experiments to investigate the susceptibility of two populations (Kunming of Yunnan and Dongguan of Guangdong province) of B. dorsalis to nine insecticides. Bioassay results demonstrated that fipronil was the most effective insecticide, followed by phoxim, abamectin, triazophos, beta-cypermethrin, chlorpyrifos, deltamethrin, malathion, and imidacloprid against the Kunming of Yunnan province population, with LD50 values that ranged from 1.55 to 187.48 ng/fly. For the Dongguan of Guangdong province population, fipronil was also most toxic, followed by triazophos, phoxim, chlorpyrifos, abamectin, deltamethrin, beta-cypermethrin, malathion, and imidacloprid, with LD50 values from 2.07 to 439.11 ng/fly. The addition of synergists triphenyl phosphate, piperonyl butoxide, and diethyl maleate yielded different levels of synergistic effects on different insecticides against each population. However, the synergistic effects on the nine insecticides against the two populations are different. The treatment of a sublethal dose (LD2o) of beta-cypermethrin together with three synergists could induce increased specific activity of carboxylesterases at the beginning of exposure, followed by a decline within 24 h. The specific activity of carboxylesterases was higher in the fat body, midgut, and Malpighian tubules, suggesting these are important tissues for detoxification. Overall, the data developed in this study provide useful information for designing an insecticide management strategy for controlling this insect in the field.
东方果实蝇，Bactrocera dorsalis（Hendel），是一种严重的昆虫害虫，对全球果园造成了巨大损失。在这项研究中，我们进行了实验，以研究两个种群（云南昆明和广东东莞）的 B. dorsalis 对九种杀虫剂的敏感性。生物测定结果表明，氟虫腈是最有效的杀虫剂，其次是辛硫磷、阿维菌素、三唑磷、β-氯氰菊酯、毒死蜱、溴氰菊酯、马拉硫磷和氯吡虫啉，对云南昆明种群的 LD50 值范围为 1.55 至 187.48ng/蝇。对于广东东莞种群，氟虫腈也是最毒的，其次是三唑磷、辛硫磷、毒死蜱、阿维菌素、溴氰菊酯、β-氯氰菊酯、马拉硫磷和氯吡虫啉，LD50 值范围为 2.07 至 439.11ng/蝇。增效剂三苯基磷酸酯、增效醚和马来酸二乙酯的添加对每个种群的不同杀虫剂产生了不同水平的增效作用。然而，对两种种群的九种杀虫剂的增效作用是不同的。亚致死剂量（LD2o）的β-氯氰菊酯与三种增效剂一起处理可诱导接触初期羧酸酯酶的比活力增加，随后在 24 小时内下降。脂肪体、中肠和马氏管中羧酸酯酶的比活力较高，表明这些是解毒的重要组织。总体而言，本研究的数据为设计田间控制这种昆虫的杀虫剂管理策略提供了有用的信息。
