氟乐灵做为棉田常用除草剂，可以防除人工和机械难以防除的株间杂草，减轻田间操作的劳动强度，提高工效，并且有利于机械作业等优点。但是，近几年来，棉田使用氟乐灵的效果不太理想，五月份棉田中草顶膜甚至因草毁苗的现象时有发生。这其中一部分原因是由于氟乐灵使用时间太 As a commonly used herbicide in cotton field, trifluralin can prevent weeds from being interfered by plants and machinery, reduce labor intensity in field operations, improve work efficiency, and facilitate mechanical operations. However, in recent years, the effect of trifluralin in cotton fields is not very satisfactory. In May, the phenomenon that grass top membrane in cotton fields even destroyed mosquitoes often occurred in grasslands. This is partly due to the use of trifluralin too much time