棉花迟熟是造成减产、品质下降的重要原因之一。南北棉区秋季多雨,棉铃开裂缓慢,吐絮不畅,往往造成大量霉铃、烂铃,不仅影响棉花的产量,也影响棉花的质量。 Late maturing cotton is one of the important reasons for the decrease of production and quality. Cotton in the northern and southern areas is wet in autumn, the cotton bolls are cracked slowly and the boll opening is sluggish, often resulting in a large number of moldy bells and rotten bells, which not only affect the cotton yield but also the cotton quality.