采集了山东 12个主要产烟县 (市 )的 39份线虫样本进行了病原鉴定。通过对线虫样本的雌虫会阴花纹观察和鉴别寄主试验进行了综合比较鉴定 ,结果表明 ,其中 2 3份为南方根结线虫 1号小种 ,占 5 8 97% ;9份为爪哇根结线虫 ,占 2 3 0 8% ;7份为花生根结线虫 2号小种 ,占 17 95 %。表明山东烟草根结线虫病病原种类以南方根结线虫 1号小种占优势。但其他种类根结线虫危害比例正在上升 Thirty-nine nematode samples collected from 12 major tobacco producing counties (cities) in Shandong Province were identified. Through the comparison and identification of the feminine perineal patterns of the nematode samples and the identification of hosts, the results showed that 23 of them were 5 8 97% of the first root knot nematode 1, 9 were the root knot nematodes , Accounting for 230.8%; 7 were peanut root-knot nematode race 2, accounting for 17.95%. The results showed that the species of root-knot nematode in Shandong province was dominated by race 1 of M. incognita. However, the hazard ratio of other root-knot nematodes is on the rise