棉田进行冬耕、冬灌和冬施肥,是来年棉花安全生长和高产丰收的关键措施之一。一、冬耕 1.可以把虫卵、病菌孢子和杂草种子埋在地下,使之腐烂或窒息死亡;裸露在地面的,可被冻死或鸟兽取食,以减轻病虫草害的发生。据观察,棉田冬耕以后棉铃虫蛹有72%被破坏;棉叶螨越冬率可降低到0.13%～0.53%。而未冬耕的棉田,棉叶螨越冬率却高达48.7%～100%。 Cotton fields for winter tillage, winter irrigation and winter fertilization, cotton is one of the key measures for the safe growth and yield of cotton in the coming year. First, the winter plowing 1. The eggs, bacteria spores and weeds can be buried in the ground, so rot or suffocate death; exposed in the ground, can be frozen to death or birds and animals feeding to reduce the occurrence of pests and diseases . It was observed that 72% of the cotton bollworm pupae were damaged after winter cultivation in cotton fields; the overwintering rate of cotton leaf mites could be reduced to 0.13% -0.53%. The winter cotton fields, cotton mite overwintering rate is as high as 48.7% to 100%.