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中国农业科学院棉花所植保室,在重视农业生态平衡,保护、利用天敌,减少农药使用的前提下。对棉田主要优势种天敌和棉蚜,棉红铃虫发生消长规律以及化学农药使用技术的多年调查研究,进一步明确了早春小麦、油菜和绿肥田是瓢虫、蜘蛛和食虫蝽等多种天敌春季生存繁殖的重要场地。麦田瓢虫数量的高峰在5月中、下旬出现,并向棉田迁移,它们既能捕食棉蚜,又能捕食棉铃虫卵和低龄幼虫。
Under the premise of attaching importance to the balance of agricultural ecology, protecting and utilizing natural enemies and reducing the use of pesticides, the cotton plantation shelter of the Chinese Academy of Agricultural Sciences On the cotton dominant dominant species of natural enemies and cotton aphids, cotton bollworm occurrence and decline of the law and the use of chemical pesticides for many years to investigate and further clarify the early spring wheat, rape and green manure is ladybugs, spiders and bug insects and other natural enemies spring Survival and breeding of an important venue. The peak of the number of ladybugs in the field occurred in mid-to-late May and migrated to the cotton fields. They could both predate the cotton aphid and prey on the eggs of Helicoverpa armigera and young larvae.