Simultaneously the complex infection of Potatovirus Y(PVY)and Cucumber mosaic virus(CMV)is also a crucial problem to be resolved at present.
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。
2
Based on the weather data from 1996 to 2002, the correlation equation between disease index of potatovirus Y (PVY) and the temperature and rainfall was established.
根据1996 ~ 2002年有关气象因素的数据，建立了气温、降水量与PV Y病情指数的相关方程。
3
The techniques included new methods to identify viruses in sweet potato roots, and better systems for multiplying improved virus-free plant varieties.