我国花生根结线虫种和小种鉴定及其细微结构观察和地区分布

本研究首次对我国4个重病区的花生根结线虫(Meloidogyne hapla、M.aren-aria)病病原统一进行了较系统的形态学观察、测量、描述及鉴别寄主鉴定、明确了我国花生上的两个根结线虫种按南,北方两个重病区有其明确的区系分布界限,未发现混生现象,即各分别为:在南方—北纬25°的广东省遂溪县等地区是花生根结线虫1号(Meloidogyne arenaria race 1)生理小种;在北方—北纬37°以北的山东省栖霞县、文登县以及河北省滦县等地区是北方根结线虫(M.hapla);而且在本研究所取样本地区均为单一根结线虫种,亦未发现有其它根结线虫种为害花生。同时还看出北方根结线虫种内四个群体间的二龄幼虫头部细微结构有所不同。

IDENTIFICATION OF SPECIES AND HOST RACE OF ROOT-KNOTNEMATODES (MELOIDOGYNE HAPLA, M.ARENARIA ) ON PEANUT AND THEIR REGIONAL DISTRIBUTION IN CHINA

Five populations of root-knot nematode on peanut(Arachis hypogaea L.)were collected and isolated from Qixia and Weng deng counties,Shan dong province; Luan xian county,He bei province; Sui xi county,Guang dong province respectively from 1985 to 1987.In this preliminary studies the observations and measures of morphological characterizations with LM and SE M,also differential host tests,had demonstrated that Qixia,Mishau and Fuji in Wengdeng,Luanxian populations were Meloidogyne hapla;Suixi population is Meloidogyne arenaria and M.arenaria host race 1.Both North root-knot nematode and peanut root-knot nematode have their distinct distributionarea,not mixed occurence each other.In addition,there are some difference in head morphology of second-stage juveniles of four populations of M.hapla.