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1.病害症状。草莓炭疽病最先发生在育苗期和定植初期,主要危害匍匐茎、叶柄、叶片、花托、花瓣、果实等部位,匍匐茎比叶片受害重。匍匐茎、叶柄、叶片染病后,初期产生直径3~7毫米的黑色纺锤形或椭圆形溃疡斑,病部稍凹陷,病斑绕茎或叶柄发展,致使病斑以上部位干缩枯死,无病新叶不矮化、黄化或畸变。取枯死株根部横切,可见从外到内变褐,但维管束不变色。2.发病规律。该病在高温高湿条件下易发生,一般6—9月份(育苗期至定植后)多发,8月至
1. Disease symptoms. Strawberry anthracnose first occurred in the seedling stage and early colonization, the main hazard stolons, petioles, leaves, receptacle, petals, fruits and other parts of the stolons than leaves damage. Stolons, petioles, leaves after the disease, the initial 3 to 7 mm in diameter black spindle or oval ulcer spot, slightly diseased lesions, lesions around the stem or petiole development, resulting in lesion dry shrinkage of the above parts, disease-free new Leaves are not dwarfed, yellow or distorted. Take dead root cross-section, showing browning from the outside to inside, but the vascular bundle does not change color. 2. The incidence of law. The disease prone to high temperature and humidity conditions, usually 6-9 months (seedling until after planting) multiple, August to