25g/L五氟磺草胺OD防除直播稻田杂草效果研究

Control Effect of Penoxsulam 25 g/L OD on Weeds in Direct Seeding Rice Field

研究了25g/L五氟磺草胺可分散油悬浮剂对直播稻田一年生杂草的防除效果。结果显示,25 g/L五氟磺草胺可分散油悬浮剂22.50～56.25 g/hm2对田间稗草、异型莎草、鳢肠、苘麻等有较好防效,且对水稻安全。田间推荐有效成分用量为22.50～33.75 g/hm2,宜在水稻3～5叶期,杂草2～5叶期喷雾施用。

The control effect of penoxsulam 25 g/L OD was studied on annual weeds in direct seeding rice field. The results showed that penoxsulam 25 g/L OD 22.50-56.25 g/hm2 had good control effects on Echinochloa crusgalli, Cyperus difformis, Eclipta prostrata, Abutilon theophrasti, and was safe to rice. The recommended dosages of active ingredient were 22.50-33.75 g/hm2, and the suitable stage was 3-5 leaf stage of rice, 2-5 leaf stage of weed.