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在害虫治理中,在消费或贮藏粮食加工产品的建筑设施或场所进行害虫防治需要将杀虫剂施用在各种基质表面上。为了测定不同基质表面上杀虫剂的药效,将四纹豆象Callosobruchus maculatus(F.)成虫接触田间推荐剂量的阿维菌素、溴氰菊酯和毒死蜱。结果表明:施用在玻璃、瓷砖、塑料和纸盘表面上,阿维菌素对四纹豆象成虫的致死率分别为63.33%,22.41%,12.9%和11.9%,而溴氰菊酯在这4种基质表面上对四纹豆象成虫的致死率分别为55%,44.2%,41.3%和37.4%。在所有基质表面上接触毒死蜱,四纹豆象成虫的死亡率均为100%。对数据进行的Probit分析表明,毒死蜱制剂在玻璃、瓷砖、塑料和纸盘上对四纹豆象成虫的LC50值分别为8.66,13.6,29.16和56.5μg/mL,阿维菌素制剂的相应数值分别为119.4,446.2,774.2和836.4μg/mL,溴氰菊酯制剂的相应数值分别为1008,1131,1210和1336μg/mL。据此推断,毒死蜱对四纹豆象的毒性最强,且在玻璃、瓷砖、塑料和纸盘表面上的毒性依次降低。
In pest management, pest control at construction facilities or sites that consume or store food processed products requires the application of pesticides to various substrate surfaces. To determine the efficacy of insecticides on different substrate surfaces, adults of Callosobruchus maculatus (F.) Were exposed to the recommended doses of abamectin, deltamethrin and chlorpyrifos in the field. The results showed that the lethal rates of abamectin to adult Beauveria bassiana were 63.33%, 22.41%, 12.9% and 11.9%, respectively, on the surface of glass, ceramic tile, plastic and paper tray, while deltamethrin The lethal rates of the four species on the four substrate surfaces were 55%, 44.2%, 41.3% and 37.4%, respectively. Chlorpyrifos exposed to all substrate surfaces showed a 100% mortality rate for all adults. Probit analysis of the data showed that the LC50 values of chlorpyrifos preparations on adult glasswort, tile, plastic and paper tray were 8.66, 13.6, 29.16 and 56.5 μg / mL, respectively, and the corresponding values of avermectin preparations 119.4, 446.2, 774.2 and 836.4 μg / mL, respectively, and the corresponding values for deltamethrin formulations were 1008, 1131, 1210 and 1336 μg / mL, respectively. It is concluded that chlorpyrifos has the strongest toxicity to Siberian bean and its toxicity on glass, ceramic tile, plastic and tray surface in turn decreases.