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目前,棉花红铃虫的常规防治办法是在各代产卵孵化盛期内喷施2—3次农药,但这种方法存在三个方面的不足之处:其一,由于第一代红铃虫发生期长,一般50天左右,二、三代发生世代重叠,自棉花现蕾开始,陆续危害,因此,不能有效地控制虫情;其二,幼虫孵化后,经30分钟左右就能蛀入蕾铃,时间短,特别是第二、三代红铃虫,80％以上的卵产在萼片内部,喷施药液很难接触卵粒,防治效果差;其三,有机氯农药
At present, the conventional control method of cotton bollworm is spraying 2-3 times of pesticides within each generation of spawning hatch, but there are three deficiencies in this method. First, since the first generation of red bell Insects occur long, usually about 50 days, two or three generations of overlapping generations, since cotton buds began, one after another harm, therefore, can not effectively control the insects; Second, the larvae hatch after about 30 minutes will be able to bite into In particular, the second and third generation of pink bollworm, more than 80% of the eggs in the sepals, spraying liquid is difficult to contact the eggs, the control effect is poor; Third, organochlorine pesticides