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自1998年临清市大面积引种转基因Bt棉以来,棉铃虫已不再是棉花上的主要害虫,棉田施药次数下降60%～80%,天敌数量大增,以前得到兼治的棉盲蝽、棉小灰象甲等棉花害虫发生逐年加重。由于近年6-8月份阴雨较多,棉花苗病、枯黄萎病等发生较重,形成了棉田病虫发生的新特点,棉盲蝽、烟
Since the introduction of transgenic Bt cotton in a large area in Linqing in 1998, the cotton bollworm is no longer the major pest on cotton. The number of pesticides in cotton fields has dropped by 60% -80% and the number of natural enemies has increased greatly. In the past, Cotton gray weevil and other cotton pests increase year by year. As more rainy days in June-August in recent years, cotton seedling disease, withered wilt disease occurred heavier, forming a new characteristic of cotton pests and diseases, cotton bug, tobacco