But some environmental issues caused by sulfonylurea herbicides, such as Chlorimuron and Chlorsulfuron, are urgently settled because of their too long residual period and the fast growth of the weeds.

• 但其中部分产品如豆磺隆、绿磺隆等对一些农作物不安全,残效期过长及抗性杂草增加很快等问题亟待解决。