2000年4月中旬，吉林省珲春市防火办在1999年春进行除草剂试验的基础上，用可湿性森草净粉剂加细土，拌成“毒土”，(药与土的比例为1：40)，人工撒到防火线的杂草灌木上，利用当地下雪天气，雪水将上述除草剂溶解渗透到植物的茎叶和土壤中，起到除草灭灌作用。于8月中旬调查， In mid-April 2000, Hunchun Fire Protection Office of Jilin Province conducted herbicide test in the spring of 1999, adding fine soil with wettable grass powder and mixing it into “toxic soil” (the ratio of medicine to soil is 1: 40), artificial scattered fire weeds shrubs, the use of the local snowy weather, the snow will dissolve the above herbicides to infiltrate the stems and leaves of plants and soil, play a role in weeding and irrigation. In mid-August investigation,