新疆吐鲁番棉区1984年以来,发生棉株青枯死亡,在百亩棉田中调查,株致死率达10—15％。经对病原菌形态观察、适生温度的调查、回接和交叉接种试验,确定为棉疫病,致病病原是寄生在哈密瓜上的优势菌种德雷疫霉菌。 Turpan cotton area in Xinjiang since 1984, the occurrence of blue-white cotton death, investigation in the area of ​​100 acres of cotton, the strain rate of 10-15%. After the morphological observation of pathogenic bacteria, investigation of the temperature of the suitable temperature, back connection and cross-inoculation test, it was identified as cotton blight, and the pathogenic pathogen was the dominant strain of P. diphtheria parasitized on cantaloupe.