目前我场稻田杂草主要有矮慈菇、节节菜、稗草等。据1990年测定未施药的稻田杂草每亩鲜重达380公斤,严重影响了水稻的生长和产量。原因是近几年来防除稻田杂草主要采用5％丁草胺除草剂,由于该药对双子叶杂草矮慈姑等效果较差,因此以矮慈菇为主的双子叶杂草有逐年加重的趋势。为了寻求防除稻田矮慈菇的有效药剂,1991年我场选用杭州农药厂生产 At present, there are mainly rice weeds in paddy field, such as short Sagittarius, absinthium, barnyardgrass and so on. According to the 1990 determination of non-applied rice weeds per acre fresh weight of 380 kg, seriously affected the growth and yield of rice. The reason is that in recent years, 5% of butachlor herbicide is mainly used for controlling weeds in paddy field. Due to its poor effect on dichotomylate weeds such as dwarf arrowhead, dicotyledonous weeds with dwarfism are increasing year by year trend. In order to seek effective control of paddy field dwarf love mushrooms, in 1991 I selected Hangzhou pesticide factory production