棉田杂草是棉花生产的一大灾害 ,成为高产、优质、低耗、增效的一个制约因素。在棉花生产中防除杂草不少团场每年都要投入大量的人力和物力 ,人工除草不仅效率低 ,而且劳动强度大 ,十分辛苦。１棉田杂草种群结构及消长规律１ １棉田杂草种群变化。新疆属于典型的大陆性气候 ,昼 Cotton weed is a major disaster in the cotton production, a high yield, high quality, low consumption, efficiency of a constraint. Many weed control in the cotton production Many groups every year to invest a lot of manpower and material resources, artificial weeding is not only inefficient, but also labor-intensive, very hard. 1 Weed population structure and its dynamics in cotton field 1 1 Change of weed population in cotton field. Xinjiang is a typical continental climate, day