进境种苗中截获的根结属线虫多为2龄幼虫,难以鉴定到种。本文对苹果根结线虫、山茶根结线虫、南方根结线虫、花生根结线虫、北方根结线虫和爪哇根结线虫6种根结线虫的幼虫尾形、头帽、口针基部球、DGO及雄虫头冠等鉴别特征进行比较,并结合mtDNA-PCR-RFLP分析,可准确鉴别上述6种常见根结线虫。 Infected seedlings in the interception of the root knot nematode mostly second instar larvae, it is difficult to identify species. In this paper, the larvae of the root-knot nematodes, headgear, stitch baseballs, DGO and root-knot nematodes of 6 root-knot nematodes of Meloidogyne incognita, Meloidogyne incognita, Meloidogyne incognita, Root-knot nematode, Male crown and other identification characteristics were compared, and combined with mtDNA-PCR-RFLP analysis, can accurately identify the above six common root-knot nematodes.