罗汉果是一种重要的名贵中材,主要分于广西、湖南及南方其他一些地方,但近些年来在栽培中发现根结线虫病的危害日趋严重,造成生长势下降,结果量锐减。一旦被其危害,首先是影响根系吸收养分,致使植株生长衰退,果实减产,继而块茎腐烂,造成全部失收,对生产损失不可忽视。危害症状。根结线虫从根部侵入后,危害根部和块茎,植株发病后,先在须根部形成大小不等的虫瘿(瘤状),呈念珠状,根结线虫不断用口针取食发育 Mangosteen is an important precious material, mainly in Guangxi, Hunan and other parts of the South, but in recent years found in the cultivation of root knot nematode disease is more serious damage, resulting in decreased potential growth, the results dropped sharply. Once it is harmed, the first is to affect the root absorption of nutrients, resulting in the decline of plant growth, fruit production, and then tuber rotten, resulting in the total loss, the loss of production can not be ignored. Hazardous symptoms. Root-knot nematodes invade from the roots, endanger the roots and tubers, plant disease, the first to be formed in the fibrous roots of varying sizes (tumor-like), was a beaded, root knot nematode feeding continued development with the needle