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棉花铃期病害是棉铃受病原微生物侵染而引起的霉烂现象。习惯上又称烂铃。棉铃受侵染后形成僵瓣、黄花,有的不能开裂,严重的全铃腐烂、纤维腐朽失收。据笔者多年系统观察,平均烂铃率为18.3％,秋雨多、闷热的年份高达66.2％。铃期病害不仅影响棉花产量,而且降低棉花品质。受病菌侵染的棉籽,发芽率降低,不宜作种,榨油则油质差。 棉铃病害在湘北以棉铃疫病、黑果病发生最普遍,危害最严重。此外,还有红腐病、红粉病、炭疽病、角斑病、茎枯病、曲霉病等病害。 棉铃病害与气候、虫害及栽培管理等许多因素有密切关系。同时,棉铃病害有不可逆性,即发病后就已
Cotton boll disease is cotton boll disease caused by microbial infection and rotten phenomenon. Also known as bad bell. Boll infested by the formation of stiff petals, yellow, and some can not be cracked, severe full-bell decay, fiber decay loss. According to the author for many years of systematic observation, the average rate of rotten bell 18.3%, autumn and hot, sultry years up to 66.2%. Bell disease not only affects cotton yield but also reduces cotton quality. Affected by bacteria infection of cottonseed, lower germination rate, should not be used as seed, oil is poor oil quality. Cotton boll disease in the northern part of the cotton boll blight, black fruit disease most common, the most serious harm. In addition, there are red rot, powdery mildew, anthracnose, angular leaf spot, stem blight, aspergillosis and other diseases. Cotton boll disease and climate, pests and cultivation management and many other factors are closely related. At the same time, cotton boll disease is irreversible, that is, after the onset of it