摘要： 对采自河北省不同地区的根结线虫种类、分布以及种群密度进行了调查，根据根结线虫二龄幼虫、雄虫和雌虫的形态特征，明确了河北省根结线虫种类有南方根结线虫、北方根结线虫和花生根结线虫。其中南方根结线虫发生最为普遍，几乎遍及全省各个地区，发生量很大，土壤线虫土壤的群体密度最高达50条/g，主要为害保护地黄瓜和番茄等作物；北方根结线虫和花生根结线虫仅局部发生，北方根结线虫主要为害花生和麻山药，花生根结线虫主要为害花生和黄瓜，北方根结线虫与花生根结线虫在土壤中的发生量相对较少，土壤线虫土壤的群体密度最高达10条/g。

关键词: 南方根结线虫, 北方根结线虫, 花生根结线虫, 鉴定, 分布

Abstract: The species and distribution as well as population densities of root-knot nematodes(Meloidogyne spp.) were investigated in Hebei province.The results showed that the species occured in Hebei include M incognita,M hapla and M.arenaria.M incognita is widly spread in Hebei and causes a serious damage to the vegetable production.The highest density of this nematode in soil reach to 50 second stage juveniles per gram soil.It maily causes damage to cucumber and tomato in the protected fields.M hapla and M arenaria only partially distributed in Hebei.M hapla maily causes damage to peanut and Dioscorea opposita while M arenaria only causes yield loss to peanut and cucumber.The population densitiy of M hapla and M arenaria are relatively lower,and the highest density of those nematodes in soil reach to 10 second stage juveniles per gram soil.

Key words: M arenaria, M hapla, M incognita, Ident ification, Distribution

中图分类号: 

• S435.6