小蔓长春花(Vinca minor)是自南斯拉夫引进的一种药用植物。该植物在北京地区引种栽培过程中受到根结线虫的严重侵染,罹病植株根系生长异常,幼根常呈不规则肿胀,根系上产生大小不一的近球形根结,根结上常次生侧根,整个根系短而蓬乱。地上部生长不良,茎叶黄化,萌生新枝减少,产量损失达25%以上。 Vinca minor is a medicinal plant introduced from Yugoslavia. The introduction of the plant in Beijing during the introduction by the root-knot nematode serious infection, the diseased plant growth abnormal root often irregular swelling, the root system produces nearly spherical root knots of different sizes, root knot often secondary Lateral root, the entire root system is short and disheveled. Poor growth in the shoots, stems and leaves yellowing, initiation of new branches to reduce the yield loss of 25% or more.