随着产业结构的调整,我区桔梗种植面积不断扩大。但由于多年连作,根结线虫病的发生有蔓延的趋势,使桔梗失去商品价值,经济效益降低。1病害症状桔梗感染根结线虫后,病轻时植株地上部分症状表现不明显;发病重时,地上部分表现生长不良矮小、黄化、萎蔫,似缺肥水或枯萎病症状,干旱 With the adjustment of industrial structure, the area planted with Campanulaceae is expanding. However, due to years of continuous cropping, the occurrence of root knot nematode disease tends to spread, so that Campanulaceae lose the value of goods, economic benefits. 1 disease symptoms Campanulaceae infected with root-knot nematode, light plant disease when the symptoms of some parts of the ground is not obvious; when the disease is severe, poor growth on the part of the performance of short, yellow, wilting, like lack of water or symptoms of Fusarium wilt, drought