根结线虫是农业生产上最重要的一类线虫,有五十种左右,可为害两千种左右植物。广泛分布于沙性土壤,特别是在温暖、干燥地区危害最重,往往造成20～30％,甚至50％左右的减产;同时它与镰刀菌、轮枝菌、疫菌的关系较大,这些真菌在根结线虫为害之后才易于侵染,加重危害。 Root-knot nematode is the most important type of nematode in agricultural production, there are about 50 species, can damage about two thousand kinds of plants. Widely distributed in the sandy soil, especially in the warm, dry areas the most harmful, often resulting in 20 to 30%, or even 50% of the reduction; the same time it and Fusarium, Verticillium, Pseudomonas The fungus in the root knot nematode harm after infection easily, aggravating the harm.