But the root-knot nematodes are very small.And it was difficult to make slices about vulva striae of root-knot nematodes now.

• 由于根结线虫的个体小，在进行会阴花纹的制片和显微观察时，常常遇到制作易败，观察模糊的现象，因而种类的正确鉴定受到较大影响。