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由田间自然感病的甜菜黑色焦枯病株、坏死黄脉型病株及无明显症状的甜菜上分离到一种球状病毒。病毒呈二十面体 ,直径约 2 5nm ,有空心和实心 2种粒子 ,具有分子量为 2 4 7kd的外壳蛋白和长度分别为 3 8kb、1 4kb、1 1kb的 3个双链RNA组分。该病毒具有较强的稳定性和侵染性 ,蚜虫不能传毒 ,土壤诱发可传播 ,易通过汁液摩擦接种侵染多种植物 ;但回接甜菜只偶尔出现个别褪绿斑或不规则褪绿斑 ,并不表现田间症状 ,表明该病毒与甜菜黑色焦枯病等病害无直接关系
A natural virus from the field of beet black scorch diseased, necrosis of yellow vein disease and no obvious symptoms of beet isolated from a virus. The virus was icosahedron, about 25nm in diameter, with two kinds of hollow and solid particles, a shell protein with a molecular weight of 247kd and three double-stranded RNA components with lengths of 38kb, 14kb and 11kb, respectively. The virus has strong stability and infectivity, aphids can not be poisonous, soil-induced spread, easy to infect a variety of plants through frictional inoculation of the juice; but the return of beets only occasionally appear individual chlorotic spots or irregular chlorotic Spot, does not show the field symptoms, indicating that the virus is not directly related to sugar beet disease and other diseases