60 g/L五氟磺草胺·氰氟草酯可分散油悬乳剂防除水稻直播田一年生禾本科杂草药效试验

Control Effect of 60 g/L Penoxsulam·Cyhalofop-butyl OD on Annual Weeds in Rice Field

为了做好直播稻田除草剂新旧品种替换工作,研究不同药剂对直播稻田杂草的防除效果,结果表明:60 g/L五氟磺草胺·氰氟草酯可分散油悬乳剂防除直播稻田杂草,对单双子叶杂草高效,速效性强,持效性好,在设计剂量范围内对水稻安全。可在直播水稻田杂草二至四叶期茎叶喷雾,施药前放干田水,药后1~3 d覆水并保水5~7 d。推荐使用剂量有效成分60~120g/hm^2。试验药剂60 g/L五氟磺草胺·氰氟草酯可分散油悬乳剂各剂量处理水稻增产28.18%~50.90%。

In order to do a good job of old and new herbicide varieties replacement in direct-sowing rice fields, control effect of different herbicides on the weeds in direct-sowing rice fields were researched. Results showed that 60g/L penoxsulam, cyhalofop- butyl dispersible oil emulsion could prevent the weeds in direct-sowing rice fields, for single and double cotyledons weeds prevention effectively, fast- acting property is strong,with good persistence,within the scope of design dose is safe to rice. 60 g/L penoxsulam- cyhalofop-hutyl dispersible oil emulsion can spray on the stem leaf in the rice fields during weeds 2-4 leaves phase,before applying herbicide should put dry paddy ,after applying herbicide 1-3 days, cover and keep water for 5-7 days. Recommended dose was active ingredient 60 g/hm^2 to 120 g/hm^2. Different treatments of 60 g/L penoxsulam·cyhalofop-butyl dispersible oil emulsion increased rice production 17.27% to 50.90%.