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棉花烂铃已成为制约棉花产量的一个重要因素,尤其是多雨年份,高产棉田、高密度棉田,由于光照差,湿度大,病虫为害等,常引起下部棉铃霉烂。为了弄清烂铃对产量和品质的影响,1989—1990年我们进行了调查分析,结果表明,烂铃率平均为12.1％,烂铃与不烂铃比较,铃重减轻2.4克,绒长减短8.4毫米,衣分降低9.8％,级别降低3级,减产11.8％,减收16.2％。一、烂铃原因 1.病菌侵染:烂铃主要是通过病原菌侵染引起的,危害棉铃的病菌有疫病、红腐病、黑果病、炭疽病等,危害严重的是疫病和红腐病。 2.虫害:棉铃虫、玉米螟蛀入棉铃,不但形成蛀孔,而且虫孔内积有大量虫便,给病菌侵染创造了
Cotton boll has become an important factor restricting cotton production, especially in the rainy years, high-yielding cotton fields, high-density cotton fields, due to poor light, humidity, pests and other harmful, often cause the lower part of cotton boll rot. In order to clarify the impact of rotten bell on yield and quality, we conducted a survey from 1989 to 1990 and found that the average rotten boll rate was 12.1%. Compared with the non-rotten boll, the boll weight was reduced by 2.4g, Short 8.4 mm, 9.8% lower clothing, level 3, 11.8% reduction, a decrease of 16.2%. First, the reasons for rotten bell 1. Pathogen infection: rotten bell is mainly caused by pathogen infection, endanger the pathogens of cotton boll disease, red rot, black fruit disease, anthracnose and so on, the serious damage is the disease and red rot . 2. Pests: cotton bollworm, corn borer into the bollworm, not only the formation of wormholes, but also a large number of worms hole product, to the bacteria infection created