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防治棉铃虫效果的好坏是直接关系到棉花生产的大问题。防治棉铃虫的化学农药品种虽然繁多,但归纳起来主要也就是四大类:一是菊酯类、二是有机磷类、三是氨基甲酸酯类、四是有机氯类,前三类在防治棉铃虫中使用量最大。但由于农民缺乏科学用药知识,单一重复使用一种农药,习惯于见虫打药,不能正确掌握防治适期和防治技术,随意增加使药次数和浓度,普遍存在
The effect of controlling cotton bollworm is directly related to the big issue of cotton production. Although there are many kinds of chemical pesticides for controlling cotton bollworm, they are mainly four categories: one is pyrethroid, the other is organic phosphorus, the third is carbamate, the other is organic chlorine. The largest use of cotton bollworm. However, due to the lack of scientific knowledge of pesticide use by farmers, a single repeated use of a pesticide is accustomed to seeing insects and insecticides, can not correctly grasp the appropriate period of prevention and treatment and prevention and control technologies, and randomly increases the frequency and concentration of drugs to make them ubiquitous