北屯垦区是向日葵高产优质区,每年播种面积20万(666.7m~2)以上。自2006年北屯垦区首次发现向日葵黄萎病后,黄萎病发生日趋严重,据2011年调查,向日葵黄萎病发病率达到8%～15%,严重影响向日葵籽粒的产量和品质。1为害症状黄萎病主要在成株期发生,一旦感病,病情蔓延迅速。症状先从下部叶片发生,叶片顶端的叶肉局部褪绿变黄,后扩大为叶片的其它叶肉也逐渐 Beitun reclamation area is high yield and high quality sunflower area, sowing area of ​​200,000 per year (666.7m ~ 2) above. Since the first detection of Verticillium wilt in sunlit wilt in Beitun reclamation area in 2006, the occurrence of Verticillium wilt was worsening. According to the investigation in 2011, the incidence of Verticillium wilt was 8% -15%, which seriously affected the yield and quality of sunflower. 1 harmful symptoms Verticillium wilt occurs mainly in adult plants, once the disease, the rapid spread of the disease. Symptoms begin with the lower leaves, with the top of the leaves whitening and yellowing at the top of the leaves, and the other mesophyll