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搞好棉铃虫的综合防治,除重点防治棉田的棉铃虫外,必须重视玉米田的棉铃虫防治,尤其是防治四代棉铃虫对玉米的危害,这不仅保住了玉米的产量和质量,而更重要的是压低棉田虫源基数,减轻翌年一代棉铃虫对麦田的危害,减少上2、3、4代的虫源。近几年的调查:棉铃虫的分布特点是一代在麦田,二代在棉田;三代70%在棉田;30%在玉米、
In addition to the prevention and control of cotton bollworm, cotton bollworm must pay attention to the prevention and control of cotton bollworm, especially the prevention and control of four generations of cotton bollworm on corn damage, which not only keep the corn yield and quality, but more It is important to lower the insect population base in cotton and reduce the damage of the cotton bollworm to the wheat fields in the next generation and reduce the number of insect pests on the 2nd, 4th and 4th generations. In recent years, the survey: the distribution characteristics of cotton bollworm is a generation in the wheat field, the second generation in the cotton field; three generations of 70% in the cotton field; 30% in corn,