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对北京地区苹果斑点落叶病研究得出,病原菌Alternaria mali Roberts强毒菌系是苹果斑点落叶病严重发生的主要原因.各果园病原菌强毒菌系发生率和致病性有差异.室内毒力测定和田间药剂防治试验结果表明,50%扑海因、70%代森锰锌、1.5%多抗霉素和10%宝丽安均有很好的抑菌效果.多抗霉素和宝丽安加入1%硼酸可以显著提高药效,并且硼酸本身对菌落生长有一定抑制作用.提出“重点保护春梢叶片,兼顾秋梢叶片”的防病原则.
The study on apple spotted leaf disease in Beijing showed that the virulent strain Alternaria mali Roberts was the main cause of apple spotted leaf decay disease.The virulence rate and pathogenicity of virulent strains of pathogenic bacteria in each orchard were different. And the field of pharmaceutical control test results show that 50% of the melatonin, 70% mancozeb, 1.5% polyoxin and 10% Polaroid has a good antibacterial effect. Polyoxin and Polaroid The addition of 1% boric acid can significantly improve the efficacy, and boric acid itself has certain inhibition of colony growth.Proposed “focus on the spring shoot leaves, taking into account the autumn shoots” disease prevention principles.