3种鳞翅目化学药剂对烟田天敌昆虫种群的影响

Effects of Three Kinds of Lepidoptera Chemical Pesticide on Natural Enemy Insect Population in Tobacco Field

研究以鳞翅目害虫烟青虫和斜纹夜蛾为防治对象,对比研究了甲维盐、氯虫苯甲酰胺和高效氟氯氰菊酯3种化学药剂对二者的防控效果,并在此基础上了解了3种化学药剂对烟田蜘蛛、草蛉、隐翅虫以及蚂蚁等天敌昆虫的影响。结果表明:3种药剂对烟青虫均有着较好的防治效果,施药3 d和7 d后防效均达90%以上,药剂之间没有差异;但是,施药后7 d,高效氯氟氰菊酯对斜纹夜蛾的防效会降低,其防治效果显著低于甲维盐和氯虫苯甲酰胺;同时,3种化学药剂对田间天敌昆虫均有抑制作用,施用甲维盐和氯虫苯甲酰胺后,天敌昆虫的增长率变缓;而施用高效氯氟氰菊酯后,天敌昆虫表现出负增长率。

Using Lepidoptera pest tobacco budworm and cotton leafworm as the control objects, comparative test was conducted to study the prevention and control effect of emamectin benzoate-chlorfenapyr, chlorantraniliprole and beta-cyfluthrin, and understood the effects of three chemicals on natural enemy insects such as field spiders, lacewings, paederus and so on. The results showed that the three chemicals had better control effect on tobacco budworm, the control effect reached more than 90% after spraying 3 days and 7 days, there was no difference between the agents; but after application 7 days, the control effect of beta-cyfluthrin against cotton leafworm will be reduced, the control effect was significantly lower than emamectin benzoate-chlorfenapyr and chlorantraniliprole; at the same time, three chemical agents had inhibitory effect on natural enemies, and the growth rate of natural enemy insects was slow after applying the emamectin benzoate-chlorfenapyr and chlorantraniliprole; after the application of beta-cyftuthrin, the natural enemy insects showed a negative growth rate.