同时，黄瓜花叶病毒（CMV）和马铃薯Y病毒（PVY）的复合侵染也是当前生产上亟待解决的主要问题。

Simultaneously the complex infection of Potato virus Y(PVY)and Cucumber mosaic virus(CMV)is also a crucial problem to be resolved at present.

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黄瓜花叶病毒是RNA病毒，突变机率相对较高，正是如此，出现了病毒株系繁多的局面。

Cucumber Mosaic virus is RNA virus, so the ration of mutant is higher and there are many strain.

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烟草蚜传病毒病的主要类群有烟草黄瓜花叶病毒（ CMV）、烟草蚀纹病毒（ TEV）、马铃薯Y病毒（ PVY）。

The main species of tobacco virus spread by aphids in Shaanxi included cucumber mosaic virus (CMV), tobacco etch virus (TEV) and potato Y virus (PVY);

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