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为了选择安全高效防治苹果斑点落叶病杀菌剂,验证其防治苹果斑点落叶病的效果和安全性,明确其适宜的使用剂量和最佳使用时期。试验针对56%丙森·醚菌酯可湿性粉剂进行了高、中、低三个剂量的对比,通过二次施药,中高剂量防效均在70%以上,并对结果进行方差分析。试验研究表明,在苹果斑点落叶病发生初期,56%丙森·醚菌酯可湿性粉剂连续用2~3次,可有效防治苹果斑点落叶病,有效成分使用量1 000~1 167mg/kg为最佳。
In order to choose safe and efficient apple spot defoliating fungicides to verify the prevention and treatment of apple spot deciduous disease effect and safety, to determine the appropriate dosage and the optimal use of the period. Test against 56% propoxurone kresoxim WP wettable powder were high, medium and low dose of three contrast, through the second application, the high dose anti-efficacy are above 70%, and the results of variance analysis. Experimental studies have shown that in the early stage of apple spotted leaf decay disease, 56% Corynebacterium ester WP can be used continuously for 2 ~ 3 times, which can effectively prevent and cure apple spot deciduous disease. The effective components are 1000-1 167mg / kg optimal.