残留药害是指由长残留性除草剂对后茬敏感作物造成的药害,能够对后茬作物造成药害的除草剂叫长残留除草剂。长残留除草剂一般都是高活性的或是超高活性的除草剂,最突出的优点是活性极高、用药量少、用药成本低、使用方便、除草效果好;它们 Remaining phytotoxicity refers to the long-residual herbicides that cause phytotoxicity to the sensitive crop of the following crop, and the herbicides that can cause phytotoxicity to the following crop are called long-residual herbicides. Long residual herbicides are generally highly active or highly active herbicides, the most prominent advantages of high activity, less dosage, low cost, easy to use, weeding effect; they