根结线虫属(Meloidogyne Goeldi,1887)为植物根系专性内寄生线虫,是植物病原线虫中种类最多、分布最广、为害最严重的类群之一,具有十分重要的经济意义。苹果根结线虫(Meloidogyne mali Itoh,Ohshima&Ichinohe,1969)首先在日本长野苹果根中发现,1969年由Itoh等描述为新种。2000年,Palmisano等将意大利榆树上发现的一种根结线虫命名为榆根结线虫(M.ulmi),但当时仅依据细微的形态差异,没有做同工酶和分子生物学研究。2013年,荷兰的Ahmed等通过对日本的苹果根结线虫和意大利的榆根结线虫详细的比较分析,明确 Meloidogyne Goeldi (1887) is a plant-specific obligate endoparasitic nematode that is one of the most diverse, widely distributed and most damaging groups of plant pathogenic nematodes. It is of great economic importance. Meloidogyne mali Itoh (Ohshima & Ichinohe, 1969) was first found in apple roots of Nagano, Japan and was described as a new species in 1969 by Itoh et al. In 2000, Palmisano et al. Named a root-knot nematode found on the Italian elm tree as M. ulmi, but no isozymes and molecular biology studies were based on subtle morphological differences. In 2013, Ahmed et al. Of the Netherlands made a detailed comparative analysis of Meloidogyne incognita against Japanese apple root knot nematode and Italy,