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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试验对比,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20%井冈霉素平均防效79.52%提高4.62个百分点;减量控害区667m2产量527.9kg,比常规用药20%井冈霉素对照区增产31.2kg,增幅6.28%。每667m2减少施药用工2.5元,667m2增加效益62.9元。建议使用时,每667m2用30%苯甲·丙环唑30ml兑水45 kg于纹枯病发生盛期对水稻叶面均匀喷雾。
The control efficacy of 30% benzopirone EC and control 20% Jinggangmycin SP against Rhizoctonia cerealis were compared, and the control effect of 30% effect. The results showed that 30% benzopurazole EC had better control effect on sheath blight, with an average control efficiency of 84.14%, an increase of 4.62 percentage points over the average control effect of 20% of Jinggangmycin of 79.52% Control yield 667m2 527.9kg, than the conventional drug 20% Jinggangmycin control area yield 31.2kg, an increase of 6.28%. Every 667m2 to reduce the application of labor 2.5 yuan, 667m2 increase benefits 62.9 yuan. It is recommended to use a spray of 30 kg of 30% benzopirone per 457 kg of 667 m 2 per plant on the leaf surface of rice at the peak of sheath blight occurrence.