滨州地区常年的棉花种植面积 6万ｈｍ2 左右。近年来 ,随着化学药剂的大量使用 ,棉铃虫的抗性不断上升 ,人们开始普遍种植抗虫棉品种 ,本区主要为菏棉 1号和中棉所 2 9号。由于受气候及抗虫棉自身的影响 ,本区 1 999年棉花红叶茎枯病发生严重。据调查 ,病田率 50 %左右 ,病株率 Binzhou area perennial cotton planting area of ​​60,000 hm2 or so. In recent years, with the extensive use of chemical agents, the resistance of the cotton bollworm has been on the rise, and varieties of insect-resistant cotton have been commonly planted in this area. Due to the climate and the impact of insect-resistant cotton itself, the serious cotton leaf blight occurred in the region in 1999. According to the survey, disease rate of about 50%, diseased rate