To study the methods of Barnyardgrass (Echinochloa crus-galli) control, which have Resistance to three herbicides like penoxsulam (25g/L. OD), bispyribac-sodium(10%.SC) and quinclorac(50%WP), we do an experiment with different herbicide formulations. The results showed that the Barnyardgrass has high resistance to Penoxsulam, bispyribac-sodium and quinclorac. We Recommend that when controlling this kind of Barnyardgrass, spray to soil with pretilachlor(300g/L.EC)1.5 L/hm2 after the germination period 0-3d and cyhalofop-butyl(100g/L.EC) or metamifop(10%.EC) 1.5 L/hm2 to the foliage in the 3-4 leaves stage, which could effectively control the resistance of the barnyardgrass.%为探讨水稻水直播稻田抗药性稗草的防除方法,采用25 g/L五氟磺草胺可分散油悬浮剂(稻杰)、10%双草醚悬浮剂(农美利)和50%二氯喹啉酸可湿性粉剂(沙稗丰)进行了不同配方的田间药效试验.结果表明:该试验田块稗草对稻杰、农美利、沙稗丰的抗药性高,建议在防除该类抗药性稗草时,水稻催芽播种后0~3 d土壤喷雾处理300 g/L丙草胺乳油(扫茀特)100 mL/667 m2,水稻3~4叶期茎叶喷雾处理100 g/L氰氟草酯乳油(千金)或10%噁唑酰草胺乳油(韩秋好)100 mL/667 m2,能有效防除此类抗药性稗草.
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