近年来,随着种植业结构的调整,胶东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快速蔓延的趋势,由原来只侵染黄瓜到目前几乎所有蔬菜都能侵染,其中以番茄、茄子、瓜类、芹菜等受害最重,一般减产20%～30%,严重地块有时毁种,是目前蔬菜生产上亟待解决的问题。一、症状本病仅发生于根部,以侧根和支根最易受害。蔬菜发生根结线虫后,轻病株地上部分症状表现不明显,重病株则矮小,变黄,发育不良,遇到干旱则中午萎蔫。重病株拔起后用清水冲洗,会发现发病后侧根或须根上产生瘤状根结,大小不等。剖开根结在显微 In recent years, with the adjustment of planting structure, the area of ​​vegetables in Jiaodong area, especially the protected area, has been expanding. Due to years of continuous cropping, the occurrence of root-knot nematodes has a tendency of rapid spread. From the original only cucumber so far, almost All vegetables can be infected, of which tomatoes, eggplants, melons, celery and other victims of the most serious, the general reduction of 20% to 30%, severe block sometimes ruin, is the current vegetable production problems to be solved. First, the symptoms of this disease occurs only in the roots, with the most vulnerable to lateral roots and root. After root-knot nematodes occurred in vegetables, the symptoms of the above-ground parts of the diseased plants were not obvious. The seriously ill plants were short, yellow and dysplasia. Heavy illness after the plant was rinsed with water, will find the incidence of lateral roots or fibrous roots produce root knot, the size range. Cut open the root knot in the microscopic