不同药剂对水稻纹枯病和稻曲病的田间防效

目的]探求防治水稻纹枯病和稻曲病的最佳方案。方法]测定8组不同处理,即20%井冈霉素可湿性粉剂100 ml/hm2(对照)、30%爱苗乳油15 ml/hm2、2.5%纹曲宁水剂200 ml/hm2、满穗0.24 g/ml悬浮剂15 ml/hm2、18%稻曲净可湿性粉剂35 g/hm2、25%使百克乳油50 ml/hm2、15%秀谷可湿性粉剂40 g/hm2、嘉润0.3 g/ml乳油15 ml/hm2、空白对照,对水稻纹枯病与稻曲病的防治效果。结果]30%爱苗乳油15 ml/hm2对水稻纹枯病和稻曲病的防治效果最优,其次为嘉润0.3 g/ml乳油15 ml/hm2、15%秀谷可湿性粉剂40 g/hm2,增产效果也较明显。结论]经综合考虑,嘉润0.3 g/ml乳油15 ml/hm2、15%秀谷可湿性粉剂40 g/hm2可有效防治水稻纹枯病和稻曲病,有利于提高稻谷的商品性能,可替代30%爱苗乳油。

Preliminary Study on Field Efficacy of Different Medicament to Sheath Blight and False Smut of Rice

Objective] Optimum scheme of controlling sheath blight and false smut of rice was studied.Method] Control effect of sheath blight and false smut by eight different treatments,namely 100 ml/hm2 20% validamycin wettable powder(control group),30% difenconazole EC 15 ml/hm2,20% wenquning water agrent 200 ml/hm2,thifluzamide0.24 g/ml suspension concentrate 15 ml /hm2,18% daoqujing wettable powder 35 g/hm2,25% prochloraz EC 50 ml/hm2,15%xiugu wettable powder 40 g/hm2,jiarun 0.3 g/ml EC 15 ml/hm2,blank control,were determined.Result] The best control effect of sheath blight and false smut of rice was difenconazole 15 ml/hm2,followly xiugu 40 g/hm2 and jiarun 15 ml/hm2.Conclusion] Comprehensive consideration suggested that jiarun 15 ml/hm2、15% xiugu can effectively control sheath blight and false smut of rice,and commodity features of rice was improved,can substictute difenconazole.