Study on the Pathogen of a Wheat Soil-borne Virus Disease in China

A soil-borne virus disease on wheat occured in Zhejiang, Jiangsu and Sichuan provinces in China was transmitted by Polymyxa graminis, and its only known host is wheat (Triticum aestivum), most wheat cultivars can be infected by growing in infective soil with chlorotic to necrosis spindle shaped streak in the leaves. Studies on virus isolates from different disesed areas showed that virus particles is filamentous, with measurements ranging from 200—1800×13—14 nm, mostly 350—850×13—14 nm, in leaf-dip or purif...