30苯甲∙丙环唑乳油防治水稻纹枯病田间药效

摘要

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.%　　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）。