论文部分内容阅读
测定了陕西省大荔、渭南、三原和杨陵４县（区）棉铃虫对溴氰菊酯、氰戊菊酯、氯氰菊酯及三氟氯氰菊酯和甲氰菊酯的抗药性。结果表明，各地棉铃虫对溴氰菊酯已产生了中等到高等程度抗药性，其抗性倍数为２９～５１倍；对氰戊菊酯处于耐药性到低等抗性阶段，其抗性倍数为３～７倍；对氯氰菊酯、三氟氯氰菊酯和甲氰菊酯尚未产生明显抗药性。因各地用药习惯、种类和水平不同，导致其种群间的敏感度存在一定差异。
The resistance of deltamethrin, fenvalerate, cypermethrin, cyhalothrin and cypermethrin to cotton bollworm (Helicoverpa armigera) in Dali, Weinan, Miyuan and Yangling counties in Shaanxi Province was measured. The results showed that cotton bollworm had a moderate to high degree of resistance to deltamethrin and its resistance multiple was 29 ~ 51 times; the resistance of fenvalerate to low resistance was high Times the number of 3 to 7 times; cypermethrin, cyhalothrin and cypermethrin have not yet had significant resistance. Due to the different habit, type and level of drug usage, there is a certain difference in the sensitivity among the populations.