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谷子病害很多,为了便于在田间调查和鉴别,编排了此检索表。一、发生在叶片上的症状1.谷子叶片变厚或扭曲,出现黄白色条纹,背面产生白色的霜霉状粉末,或病叶变褐,叶肉组织被破坏呈乱发状……白发病。2.谷子叶片上病斑呈纺锤形或梭形,中央灰白色,边缘青褐色,有时出现暗色水渍状,多数病斑相连,叶片变黄褐色卷曲枯死……谷瘟病。3.谷子叶片上病斑呈椭圆形,在表面或背面散生和条生棕褐色的病斑,在病斑上隆起孢子堆,孢子堆破裂后散出黄褐色粉末……谷锈病。
Millet disease many, in order to facilitate in the field investigation and identification, arrange the search form. First, the symptoms occurred in the leaves 1. Millet leaves thicker or twisted, yellow-white stripes appear on the back of white downy mildew-like powder, or sick leaves brown, mesophyll tissue is broken hair ... ... white hair disease. 2. Millet leaves on the lesion was fusiform or fusiform, central gray, edge of the brown, sometimes dark-colored water-like, most of the lesion connected, the leaves turn yellowish brown curly dead ...... Valley blast. 3. Millet leaves on the lesion was oval, scattered in the surface or back of the raw and brown stripes of the disease, in the lesion uplift spores heap, after the rupture of the spore pile scattered brown powder ... ... Valley rust.