30%苯甲·丙环唑乳油防治水稻纹枯病田间药效

选用减量控害30%苯甲·丙环唑乳油与常规对照20%井冈霉素SP防治纹枯病进行药效对比试验,评价试验药剂30%苯甲·丙环唑对纹枯病的防治效果。试验结果表明,30%苯甲.丙环唑乳油药剂对纹枯病有较好的防效,平均防效达84.14%,比对照20%井冈霉素平均防效79.52%提高4.62%;减量控害区产量比常规用药增产31.2 kg/u,增产6.28%。减少施药用工2.5元/u,增加效益62.9元/u。建议使用时,用30%苯醚甲环唑.丙环唑30 mL/u对水45 kg/u于纹枯病发生盛期对水稻叶面均匀喷雾（全文设u=667 m2,单位面积）。

Field Efficacy of 30% Difenoconazole Propiconazole EC against Rice Sheath Blight

The reduction of pest control 30% difenoconazole propiconazole EC and routine control of 20% validam ycin SP against sheath blight were compared,the control efficacy of 30% difenoconazole propiconazole against sheath blight were evaluated.The results show that,30% difenoconazole propiconazole EC has good control efficacy on Rhizoctonia solani,the average control efficacy reached up to 84.14%,and it was 4.62% higher than the control efficacy of 20% validam ycin SP reduction of pest control region 667 m2 yield 527.9 kg while conventional medication 20% validam ycin SP control area 667 m2 yield 496.7 kg,the former increase 31.2 kg/u,which increase by 6.28%.The pesticide employment is less 2.5 yuan/u,increase benefit 62.9 yuan/u.The results suggest that 30% difenoconazole propiconazole EC 30 mL/u with added water 45 kg/u against rice sheath blight by foliar spray evenly at the occurrence stage of sheath blight.