随着耕作制度的变革，茶叶面积不断扩大，近年来茶根结线虫呈上升趋势，对发展茶叶生产威胁很大。 该病主要危害茶苗，以及３～４年生以下的幼龄茶树根部。被害根部色泽变深，并形成许多大小不等的瘤状物（虫瘿），大的象蚕豆，小的象油菜籽。病株根系没有须根，成畸形，有时末 With the reform of the tillage system, the area of ​​tea has been constantly expanding. In recent years, the root-knot nematode showed an upward trend, threatening the development of tea production. The disease mainly endangered tea seedlings, as well as 3 to 4 years old young tea roots below. Victims of the darkening roots, and the formation of many different sizes of neoplasms (insects), big like beans, small like rapeseed. Roots diseased plants without fibrous roots, into deformity, and sometimes the end