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为明确新型杀菌剂18.7%丙环·嘧菌酯悬浮剂对单季稻纹枯病的防效和增产作用,进行了该药剂的相关试验。结果表明,667 m2喷施18.7%丙环·嘧菌酯悬浮剂50 m L,在分蘖中期和破口前5 d进行2次,防效为92.8%,与当前理想药剂32.5%苯甲·嘧菌酯防效接近,无显著差异;比空白对照增产19.0%;在分蘖中期防治1次的防效为79.6%,也与苯甲·嘧菌酯防效无显著差异,比空白对照增产15.4%。根据防效和药成本综合衡量,建议该药剂在纹枯病中等发生田块防治1次,偏重发生田块防治2次。
In order to clarify the control effect and the increasing effect of 18.7% propoxypyr-azoxystrobin suspension on rice sheath blight of single season, the related experiments of this agent were carried out. The results showed that 50% of the 18.7% propoxypyrazine azoxystrobin suspension was sprayed on 667 m2 for 2 times at mid-tillering stage and 5 days before breaching, the control effect was 92.8%. Compared with the current 32.5% The control effect of the fungicides was close and no significant difference was observed. The yield was 19.0% more than the blank control and 79.6% at the middle stage of tillering. There was no significant difference between the fungicides and the control. The yield was 15.4% . According to the comprehensive evaluation of the anti-efficacy and drug costs, it is suggested that the pesticide should be field-controlled once in the middle of sheath blight, and the prevention and control of fields should be emphasized twice.