近几年,抗虫棉因其抗棉铃虫效果好,可以显著降低防治棉铃虫次数,大量节省人力、物力、财力而广为种植。但抗虫棉只对棉铃虫等鳞翅目害虫具有防治效果(甜菜夜蛾除外),因为防治棉铃虫用药次数的明显减少,对一些原先的次要害虫的兼治作用显著降低,发生加重,甚至有上升为主要害虫的趋势,而农民多对此认 In recent years, because of its good effect against cotton bollworm, cotton insect breeder can significantly reduce the number of cotton bollworm and save a lot of manpower, material resources and financial resources for planting. However, the insect-resistant cotton only had the control effect against the lepidopteran pests such as the cotton bollworm (except beet armyworm), because the number of bollworm control was significantly reduced, and the effect of treating some of the original secondary pests was significantly reduced, aggravated, and even There is a tendency to rise as a major pest, and farmers recognize this more