摘要： 采用浸渍法测定了4种氯代烟碱类杀虫剂在不同温度下对梨黄粉蚜的室内毒力。结果表明：20 ℃时，吡虫啉的LC₅₀为6.4121 mg/L，触杀毒力明显高于啶虫脒、阿克泰、F4；25 ℃，30 ℃时啶虫脒的LC₅₀值分别为2.8281 mg/L，1.5495 mg/L，触杀毒力明显高于吡虫啉、阿克泰、F4。同一温度下4种药剂的毒力测定结果表明：F4、吡虫啉、啶虫脒、阿克泰均在30 ℃时表现高的触杀毒力，其LC₅₀分别为10.0369，2.3686，1.5495，9.2555 mg/L，温度对4种药剂对梨黄粉蚜的毒力有明显影响。

关键词: 杀虫剂, 梨黄粉蚜, 温度, 毒力测定

Abstract: The toxicity of four insecticides to Aphanostigma jakusuiensis was tested with the dip method. The results showed that when the temperature was 20℃, the LC₅₀ value of imidacloprid was 6.4121 mg/L, the contact toxicity was obviously higher than any of acetaniprid, thiamethoxam and F4 EC, when the temperature was 25℃ and 30℃, the LC₅₀ of acetaniprid were 2.8281 mg/L and 1.5495 mg/L respectively, the contact toxicity was the highest of the four insecticides. The experiment of four insecticides at the same temperature showed that when the temperature was 30℃, the contact toxicity of all the four insecticides was the highest, the LC₅₀ were 10.0369, 2.3686, 1.5495 and 9.2555 mg/L respetively, the temperature influenced their toxicity to Aphanostigma jakusuiensis.

Key words: Insecticicides, Aphanostigma jakusuiensis, Temperature, Toxicity

中图分类号: 

• S481.4