(接上期)为了正确掌握和合理使用除草剂,人们便根据不同标准对众多的除草剂进行分类。由于分类方法很多,因而一种除草剂有多个称呼,如20%克无踪水剂为化学除草剂、有机合成除草剂、灭生性除草剂、触杀型除草剂、茎叶处理除草剂,等等。下面介绍除草剂的20种分类方法。一、按有效 (Continued) In order to correctly grasp and rational use of herbicides, many people will be classified according to different standards of herbicides. Due to many classification methods, a herbicide has several names, such as 20% of traceless trace agent is chemical herbicide, organic synthetic herbicide, biocidal herbicide, contact herbicide, stem and leaf herbicide, etc. Wait. Here are 20 herbicide classification methods. First, according to effective