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笔者从中国农业科学院植物保护研究所办公室了解到,我国棉花害虫种类繁多,据报道有300多种,造成危害的有20~30种,年发生面积都在2亿亩次以上,防治面积在3亿亩次以上。自上世纪90年代以来,由于生态、气候、品种等变化,特别是在黄河流域、长江流域棉区,转Bt基因棉的大面积种植,棉铃虫等鳞翅目害虫得到有效控制,但棉蚜、棉叶螨、棉盲蝽、棉粉虱等刺吸式害虫的发生却日趋加重,对棉花生产影响很大。目前,由于农民超剂量、盲目用药普遍,加速了棉花害虫抗药性上升的速度,棉蚜已经对菊酯类药剂产生了极高的抗性,最高达到数千甚至上
The author learned from the Office of the Institute of Plant Protection, Chinese Academy of Agricultural Sciences, a wide range of cotton pests in our country, it is reported that there are more than 300 species, causing 20 to 30 kinds of damage, the annual occurrence area of more than 200 million mu times, the control area of 3 Acres or more times. Since the 90s of the last century, Lepidopteran pests such as cotton bollworm have been effectively controlled due to the changes of ecology, climate and variety, especially in the cotton fields of the Yellow River and the Yangtze River, , Cotton spider mite, cotton laceworm, cotton whitefly and other sucking and sucking pests are increasingly aggravating, a great impact on cotton production. At present, cotton pests have already had extremely high resistance to pyrethrins due to the overdose of farmers and the widespread blind use of drugs, accelerating the rise of the resistance of cotton pests to thousands or even higher