在自然界,各种农作物害虫为了适应环境,在长期的进化过程中,形成了各具特色的越冬本领,了解它们的越冬情况,抓住其弱点采取防治措施,就能降低下年病虫发生基数,减少下年化学农药用量,节约生产成本,收到事半功倍的效果。病虫的多种越冬方式。有的害虫以成虫越冬,如蚜虫、棉红蜘蛛等,它们在冬前会在体内贮存大量营养物质,入冬后停止活动,蛰伏过冬;有的害虫以幼虫或虫蛹越冬,如水稻螟虫、玉米钻心虫以幼虫吐丝结网,在作物秸秆中度过冬天。棉铃虫 In nature, in order to adapt to the environment, pests of various crops have formed their own overwintering skills in the course of long-term evolution. Understanding their overwintering conditions and grasping their weaknesses and taking prevention and control measures can reduce the base of pest and disease occurrence in the next year , Reduce the amount of chemical pesticides next year, save production costs, receive a multiplier effect. A variety of pests and winters way. Some pests to adult wintering, such as aphids, cotton spider mites, they will be in the body before winter storage of large amounts of nutrients, stop activities after winter, dormant winter; some pests or larvae or pupae wintering, such as rice stem borer, Corn bore worms to larvae spit network, spend the winter in the crop stalks. Cotton bollworm