目前,我国棉花种子品质较差。种子纯度低:不少原、良种带黄枯萎病菌,加上种子管理不严,自由串换,致使“这种病随种子远距离传播”,病区面积不断扩大;同时,由于我国特殊的生态条件,北方各省棉花生育后期温度低,南方各省普遍实行麦套棉,以及阴雨、台风等不利天气的影响,种子成熟度差,健子率低,不少地区利用未经加工处理的种子播种,种 At present, China’s cotton seed quality is poor. Seed purity is low: many of the original, the elite with yellow wilt bacteria, coupled with lax seed management, free string exchange, resulting in “the disease spread with the seeds long-distance”, the ward area continues to expand; the same time, due to our special ecological conditions In the northern provinces, the temperature at the later stage of cotton growth is low. Wheat and cotton are widely practiced by all the provinces of the north of the country. In addition, adverse weather such as rainy weather and typhoons adversely affects the seed maturity and the low rate of healthy seedlings. Many areas use unprocessed seeds for sowing and planting