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1 发病区别危害症状区别1.1 发病始期;黄萎病一般现蕾期开始发病,枯萎病子叶期即可开始发病。1.2 发病时期:黄萎病在棉株生长到7～8月开花结铃期达发病高峰,枯萎病在6月现蕾期前后达发病时期。1.3 叶形:黄萎病病株叶片大小正常,先从下部开始发病,后向上发展,病叶初期,病叶边缘和叶脉之间的叶肉部分,局部出现淡黄色斑驳,形成不规则状、后期病斑加深,呈黄色毛褐色,以后病斑相互连成掌状、病叶向上缘卷曲,后枯焦脱落;枯萎病病叶局部变黄或变紫,呈局
1 difference between the onset of symptoms of the difference 1.1 The onset of the disease; Verticillium generally budding onset, the onset of the blight of the disease leaf stage. 1.2 The onset period: Verticillium wilt in the cotton plant growth until July to August reached the peak incidence of flowering and bollworm, blight disease in June before and after the onset of budding period. 1.3 leaf shape: Verticillium wilt leaves normal size, the first start from the lower part of the disease, after the upward development of diseased leaves at the beginning, diseased leaves and leaf veins between the leaf part of the local yellowish mottled to form irregular, late Lesions deepened, yellow brown, after the lesion interconnected into palms, sick leaves to the upper edge of the curl, after Kujiao shedding; wilt disease leaves turn yellow or purple, showing the Council