7种杀虫剂对苹果黄蚜和异色瓢虫的毒力及选择毒性研究

Study on the Toxicity and Selectivity of 7 Insecticides to Aphis citricola and Harmonia axyridis

为了研究常用杀虫剂对苹果黄蚜(Aphis citricola Van der Goot)及其天敌昆虫异色瓢虫(Harmonia axyridis Pallas)不同时间段的毒力及选择性,解决有害生物化学防治与生物防治的矛盾,本试验采用滤纸片法测定了7种杀虫剂对苹果黄蚜和异色瓢虫的室内毒力,并分析了各杀虫剂对两种昆虫的选择毒力.结果表明,10%烯啶虫胺水剂对苹果黄蚜和异色瓢虫的毒力最高,21%噻虫嗪悬浮剂对异色瓢虫的选择安全性最高.21%噻虫嗪悬浮剂具有较高的正向选择性,既可有效控制苹果黄蚜,同时还具有较高的毒力选择性,其适合在果园与蚜虫天敌异色瓢虫协同防治苹果黄蚜.

In this paper,the filter paper method was used to determine the indoor toxicity of 7 commonly used insecticides and to study their virulence and selectivity against Aphis citricola and its natural enemy Harmonia axyridis in different time periods,and to solve the contradiction between chemical control and biological control of harmful organisms.The results showed that 10%nitenpyram water had the highest virulence against A.citricola and H.axyridis and that 21%thiamethoxam suspension had the best selection safety for H.axyridis,which indicated that thiamethoxam has a high positive selectivity and is suitable to control A.citricola in orchards.