不同除草剂对水稻机插秧田杂草的防效及安全性评价

Weeds controlling efficiency of different herbicides in mechanized transplanting paddy field and its safety evaluation

为明确水稻机插秧田杂草对除草剂的敏感性,选择了11种除草剂在山东的鱼台和利津进行药效试验。比较各处理防效发现,鱼台机插秧田土壤处理用47%异丙隆·丙草胺·氯吡可湿性粉剂或40%苄嘧·丙草胺可湿性粉剂,对总草的防效均在95%以上;茎叶处理用60 g/L五氟·氰氟草酯可分散油悬浮剂,株防效达94.25%。利津机插秧田土壤处理用40%苄嘧·丙草胺可湿性粉剂或35%苄嘧·丁草胺可湿性粉剂,对总草的防效均在90%以上;茎叶处理用25 g/L五氟磺草胺可分散油悬浮剂,株防效达93.02%。以上处理持效期均长达30 d。

In order to evaluate the sensibility of weeds in mechanized transplanting paddy field, pesticide effect experiments of 11 kinds of herbicides were conducted in Yutai and Lijin in Shandong province. The results in Yutai showed that efficiency against weeds were above 95% in mechanized transplanting paddy field with the soil treated by47% halosulfuron-methyl·pretilachlor·isoproturon WP or 40% bensulfuron-Pretilachlor WP, and plant controlling efficiency reached to 94.25% by treatment of stem and leaf with 60 g/L penoxsulam·cyhalofop-butyl dispersible oil emulsion. The results in Lijin showed that efficiency against weeds were above 90% in mechanized transplanting paddy field with the soil treated by 40% bensulfuron-pretilachlor WP or 35% bensulfuron-butachlor WP, and plant controlling efficiency reached to 93.02% by treatment of stem and leaf with 25 g/L penoxsulam dispersible oil emulsion. Persistence period of the treatments above were more than 30 days.