Efficacy of Difenoconazole-azoxystrobin 32.5% SC in Treatment of Rice Sheath Blight and Its Application Technology

[Objective] The efficacy of difenoconazole-azoxystrobin 32.5% SC for rice sheath blight and its application technology were discussed in this research. [Method] Three surveys were carried out. There were 5 fixed test clumps in each plot. The number of total plants and disease plants and disease progression in each fixed clump were recorded. The correlation effectiveness was calculated based on the growth rate of disease index. Significance analysis was performed with Dun- can＇s new multiple range method （DMRT）. [Result] The difenoconazole-azoxystrobin 32.5% SC had a good efficacy for rice sheath blight, and its efficacy increased with the increase of dose. If sprayed according to the dose of 450 ml/hm2 5 days before the beginning of heading stage of rice, difenoconazole-azoxystrobin 32.5% SC would have better effects on controlling rice sheath blight with correlation effectiveness reaching up to 95.14%, which was 2.06% higher than that of control drug （trifloxys- trobin-tebuconazole 75% WG, 225 g/hm2）. [Conclusion] Treated with difenoconazole- azoxystrobin 32.5% SC with dose of 450 ml/hm2, rice would have green upper leaves and less yellow middle and lower leaves. Moreover, the yield was in- creased significantly. The difenoconazole-azoxystrobin 32.5% SC had good safety. Therefore, difenoconazole-azoxystrobin 32.5% SC had a good application prospect in production.

32.5%苯甲·嘧菌酯SC防治晚稻病害示范总结

针对32.5%苯甲·嘧菌酯SC防治晚稻病害相关内容,结合示范研究,做了简单的论述。从实际应用效果来说,32.5%苯甲·嘧菌酯SC的应用,能够有效防治晚稻病害,具有推广应用价值。

32.5%阿米妙收悬浮剂防治甘蔗凤梨病效果

采用32．5％阿米妙收悬浮剂4种不同稀释倍数与常规药剂对甘蔗凤梨病进行田闻药效对比试验。结果表明，32．5％N米妙收悬浮剂处理对甘蔗风梨病防效随施用浓度（量）的增加而提高，甘蔗的萌芽率与防效成正相关。32．5％阿米妙收悬浮剂1000倍液、1500倍液对甘蔗凤梨病防效达32．10％39．63％，明显优于常规药剂；32．5％阿米妙收悬浮剂1000倍液、1500倍液及2000倍液处理甘蔗的萌芽率达60-24％以上，高于常规药剂，达到大田生产指标。建议32．5％阿米妙收悬浮剂使用浓度以1000-1500倍液为宜。