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中江县是四川省栽培中药丹参、白芷、桔梗的主要产区。近年来3种中药均大面积发生病害,其病状首先枝叶和幼芽枯萎变黄,植株比正常株矮小,发育不育,以后逐渐全株枯萎死亡。根部则呈现主根细小,须根增多,且在根上长出许多大小不等的瘤状或结节状物。本病感染率高达100％,发病率为50％以上,且病株不能作药用,经济损失很大。经实验室检查,确诊该病为根结线虫病,是由南方根结线虫(Meloidogyne incognita)引起
Zhongjiang County, Sichuan Province is the main cultivation of Chinese medicine Salvia, Angelica, Campanulaceae main producing areas. In recent years, three kinds of traditional Chinese medicine have occurred in a large area of disease, the first branch of the disease withered withered and yellowish yellow, plant shorter than the normal strain, sterile, and later gradually wilt death of the whole plant. The root shows a small main root, fibrous roots increased, and grow in the root of many sizes of nodules or nodules. The infection rate as high as 100%, the incidence rate of 50% or more, and the diseased strains can not be used for medicinal, great economic loss. After laboratory tests, the disease was confirmed as root-knot nematode disease caused by Meloidogyne incognita