棉田化学除草是棉农栽培中的一项重要措施,具有省工省力效果好的优点,但许多地方往往出现一些意想不到的药害,导致棉田不仅除草效果不好,而且伤害棉株或导致滞长甚至产生死苗。因此,在开展棉田化除时一定要选对适用药剂,根据棉花不同生育时期及棉田发生的杂草种类,做到合理安全使用除草剂。棉田杂草种类。在长江流域棉区,棉田杂草主要有马唐、千金子、牛筋草、水花生和稗草等。其危害一般出现 Cotton weed chemical weed control is an important measure in the cultivation of cotton farmers. It has the advantages of labor-saving and labor-saving effect. However, some unexpected phytotoxicity often occurs in many places, causing not only weeding effect of cotton field is not good, but also cotton plants damage or lead to stagnation Even produce dead seedlings. Therefore, when carrying out the cotton field should be selected in addition to the appropriate agents, according to the different cotton growing period and the occurrence of cotton weed species, so that the rational use of herbicides safe. Cotton weed species. In the cotton area of ​​the Yangtze River, cotton weeds mainly Crabgrass, Qianjinzi, tendon grass, peanut water and barnyard grass. The harm generally occurs