摘要
东海根结线虫（Ｍｅｌｏｉｄｏｇｙｎｅｄｏｎｇｈａｉｅｎｓｉｓ）引发一种新的根结线虫病害在我省沿海沙滩大面积严重为害柑桔。本文报道其侵染柑桔后引起树体严重衰退，并描述了致病的三个阶段特点以及地下根部结瘤新症状。致病三阶段指侵染期、衰退期和衰败期。其新症状是：１．根瘤内除含雌虫外还含有大量雄虫，它们幼虫期均刺激寄主根组织而产生巨型细胞．共同为害根部：２．根瘤内没有雌虫仅含雄虫，但幼虫期也产生巨型细胞，所形成的根瘤比雌虫形成的根瘤略小。
Donghai Root-knot Nematode causes a new root-knot disease which damages sandy beach-growing citrus in large area along the coast of Fujian province. This paper described a seri-ous decline of the infected citrus trees and reported three diseasedes phases and new root-knot symptom in the underground part. The three phases are. the infectious phase, the declining phasethe waning phase. The new root-knot symptom is,1.there are a lot of males in the root-knots be-sides females, they damage root system by jointly stimulating root tissue to induce giant cells at their juvenile stage:2. only males were found in the root-knots, they are able to induce giant cells and form smaller root-knots than the ones which induced by females.
关键词
东海根结线虫
危害
柑桔类果树
Donghai root-knot nematode , Three diseased phases, New symptom
