除草剂在我国农业生产上已推广多年了,成效十分显著,但是,在应用除草剂的过程中,也常有些不尽人意的情况发生。有的农民说,用了除草剂仍然杀不死杂草;有的说虽然能除草,但除草率不高;有的说,除了草也危害了作物;有的说,除了当季作物的草,危害了下季作物的苗。因此,有的农民说除 Herbicide has been promoted for many years in agricultural production in our country. The effectiveness is very remarkable. However, there are some unsatisfactory situations in the application of herbicide. Some farmers said that the use of herbicides still kill dead weeds; some said that although weeding, but the weeding rate is not high; some say, in addition to the grass also endangered the crops; some say, in addition to the seasonal crop of grass, Hazardous next season crop seedlings. Therefore, some farmers said except