39.8%五氟·丁草胺悬乳剂防治单季移栽稻杂草药效试验

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。

Herbicidal Effect of 39.8% Penoxsulam Machette SC on Transplanted Rice

In order to identify the preventive effect of 39.8% penoxsulam · machette SC on weeds among transplanted rice, and its period of proper use and security, the experiments were conducted by sampling in ifve locations and the whole ifeld. The results showed the grass weeds in ifeld could be effectively removed off after 5-7 d. The herbicidal effect lasted for 70% even within the period from 15-17d to 45-47d. Moreover, it was more effective to controlEchinochloa crusgalli (L.) Beauv. As for the herbicidal effect on broad leaved weeds, 39.8% penoxsulam · machette SC equaled to 25%bensulfuron methyl · machette GR, and it was safe to rice. Therefore, 25%bensulfuron methyl · machette GR could be applied in the ifelds where grass weeds and broad leaved weeds grow.