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长江中下游棉区到结铃吐絮期,常发生烂铃现象,一般田块烂铃烂桃率达10%-15%,严重发生期可达30%-40%,常造成棉花减产和降低品质,因此必须引起重视。烂铃烂桃的原因。棉花发生烂铃现象,与气候、病虫害及栽培技术等许多因素有着密切的关系。一是气候因素。夏秋季多雨,高温高湿,光照减少,有利于病菌的繁殖和传播,当棉铃开裂,这种烂铃就会在多种病菌的侵染之后,导致病害烂铃严重发生。因此,病菌是诱发烂铃的内在因子。据农技部门调查,烂铃中一般炭疽病危害占2.5%-3.5%,黑果病占
The middle and lower reaches of the Yangtze River cotton boll bolting period to the end of the bolls, often the phenomenon of rotten bell, rotten perennial common rotten peach rate of 10% -15%, a serious occurrence of up to 30% -40%, often resulting in cotton yield and reduce the quality , So must pay attention. Bad bell rotten peach reason. The occurrence of bad bolls in cotton is closely related to many factors such as climate, pests and diseases and cultivation techniques. First, the climate factor. Rainy summer, high temperature and humidity, light reduction, conducive to the propagation and spread of germs, when the cotton boll cracking, this bad bell will be in a variety of germs infection, leading to serious disease rotten bell. Therefore, the bacteria is the internal factor inducing rotten bell. According to the survey of agricultural technology sector, the general incidence of anthrax in rotten bellies accounted for 2.5% -3.5%