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根据近年调查,保护地韭菜灰霉病平均病株率26.7％,最高达82％,是露地韭菜病株率的3倍。严重影响了韭菜的品质和菜农的经济效益 灰霉病主要发生在叶子上,病斑由叶尖开始逐渐向中间发展 病斑初为白色或浅灰色小斑点,后呈椭圆形或梭形,最后病斑愈合成大斑,致使韭叶干枯;潮湿时,病斑表面生有稀疏霉层。有时病斑上不产生白点,而近地面叶片是深绿色水渍状,有褐色轮纹、病斑多呈圆形至”V”字形,最后病部向下延伸,病叶组织黄褐色生有灰色霉层至腐烂。
According to recent surveys, the average percentage of diseased chives botrytis in protected areas is 26.7%, up to 82%, which is three times higher than that of leeks in the open field. Seriously affecting the quality of leeks and the economic benefits of vegetable farmers gray mold occurs mainly in the leaves, the lesion began gradually from the tip to the middle lesion early white or light gray spots, after the oval or fusiform, and finally Lesions into large spot healing, resulting in dry leek leaves; damp, the lesion surface sparse mildew layer. Sometimes spots do not produce white spots, and near the ground leaves are dark green water-like, brown round pattern, lesions were mostly round to “V” shape, the last disease extends downward, sick leaves tissue brown Gray mold to decay.