桃缩叶病是桃树的重要病害之—,在国内普遍发生,时常流行成灾。在流行年份造成桃树早期落叶,影响正常结果。严重的春梢叶片几乎全部落光,造成当年第二次开花,严重削弱树势。症状:桃缩叶病主要危害叶片,间或危害嫩枝及幼果。染病嫩叶从芽鳞抽出即呈现卷曲状,随着叶片逐渐展开,叶片曲卷、皱缩症状加重。严重时,叶片全部变形,叶肉肥厚、质脆,星淡黄至红褐色。后期病叶表面长出一层灰白色粉状物,此即病菌的子囊孢子和芽孢子。病叶最后干枯脱 Peach leaf fall disease is an important disease of peach trees - common in China, often catastrophic. Perennial early deciduous trees in the popular year, affecting the normal results. Serious spring shoot almost all the light leaves, resulting in the second flowering that year, seriously undermining the tree. Symptoms: peach leaf scab is the main hazard leaves, or damage to shoots and young fruit. The diseased leaves are curled when they are extracted from the bud scales. As the leaves gradually unfold, the curl and shrinkage symptoms of the leaves are aggravated. Serious, all the deformation leaves, leaf hypertrophy, crisp, star yellow to reddish brown. Late stage leaf surface grow a layer of white powder, that is, the bacteria ascospores and spores. Sick leaves finally dry off