随着种植结构的调整，一些地区蔬菜面积尤其是保护地栽培面积不断扩大。由于多年的连作，根结线虫病的发生有蔓延的趋势，由原来只侵染黄瓜到目前侵染番茄、茄子、辣椒、白菜、芹菜等蔬菜，对蔬菜生产危害很大。　　蔬菜感染根结线虫病后，轻病株地上部分症状表现不明显，重病 With the adjustment of the planting structure, the vegetable area in some areas, especially the protected area, has continuously expanded. Due to years of continuous cropping, the occurrence of root-knot nematodes has a tendency to spread. From the original only infected cucumbers to the current inoculation of vegetables such as tomato, eggplant, peppers, cabbage and celery, it is very harmful to vegetable production. After the root-knot nematode infection of vegetables, the symptom of the above-ground parts of the light-weight plant was not obvious and seriously ill