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为明确39.8%五氟·丁草胺悬乳剂(稻悠)对单季移栽稻杂草的防除效果、使用适期及安全性,通过5点取样和全田调查对该药剂的大田杂草防除效果进行了试验。结果表明:39.8%五氟·丁草胺悬浮剂在水稻移栽后5~7 d施用能有效防除禾本科杂草,且药后15~17 d到药后45~47 d依旧有70%以上的防效,尤其是对稗草防效更佳,而防除阔叶草方面,39.8%五氟·丁草胺悬浮剂与对照药剂25%苄·丁细粒剂相当,而且该药剂对水稻安全无害。因此,39.8%五氟·丁草胺悬浮剂在水稻移栽后5~7 d可用于以稗草为主的禾本科杂草和阔叶杂草混生的田块。
In order to clarify the control effect of 39.8% pentachlorobutachlor suspension (Yoyo) on weeds in single season transplanting rice, the weed Control effect was tested. The results showed that 39.8% pentachlorobutachlor suspension could effectively control gramineous weeds five to seven days after transplanting rice, and still more than 70% after 15-17 days and 45-47 days after treatment , Especially against barnyardgrass, and against broadleaf, 39.8% of pentafluorobutachlor suspending agent was comparable to the control agent 25% Benzethidine fine granules, and the agent was safe for rice harmless. Therefore, 39.8% of pentafluorobutachlor suspending agent could be used for the mixed field of grass weed and broad-leaved weed dominated by barnyard grass 5-7 days after rice transplanting.