A nationwide survey was performed to investigate the current incidence of viral diseases in Korean sweet potatoes for germplasm and growing fields from 2011 to 2014. A total of 83.8% of the germplasm in Korea was infected with viruses in 2011. Commercial cultivars that were used to supply growing fields were infected at a rate of 62.1% in 2012. Among surveyed viruses, the incidence of five Potyvirus species that infect sweet potato decreased between 2012 and 2013, and then increased again in 2014. Representatively, the incidence of Sweet potato feathery mottle virus (SPFMV) was 87.0% in 2012, 20.7% in 2013 and then increased to 35.3% in 2014. Unlike RNA viruses, DNA viruses were shown to decrease continuously. The incidence of Sweet potato leaf curl virus (SPLCV) was 5.5% in 2003, 59.5% in 2011, and 47.4% in 2012. It then decreased continuously year by year to 33.2% in 2013, and then 25.6% in 2014. While the infection rate of each virus species showed a tendency to decline, the virus infection status was more variable in 2013 and 2014. Nevertheless, the high rate of single infections and mixed infection combinations were more variable than the survey results from 2012. As shown in the results from 2013, the most prevalent virus infection was a single infection at 27.6%, with the highest rate of infection belonging to sweet potato symptomless virus-1 (SPSMV-1) (12.9%). Compared to 2013, infection combinations were more varied in 2014, with a total of 122 kinds of mixed infection.

中文翻译：

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2011年至2014年韩国甘薯病毒发病情况。


2011年至2014年，对韩国红薯种质资源和种植田的病毒病发病率进行了全国性调查。2011年，韩国共有83.8%的种质资源感染了病毒。 2012年，供应种植地的感染率为62.1%。在调查的病毒中，感染甘薯的5种马铃薯Y病毒属的发病率在2012年至2013年期间有所下降，然后在2014年再次上升。代表性的有甘薯羽状斑驳病的发病率病毒（SPFMV）2012年为87.0%，2013年为20.7%，2014年增加至35.3%。与RNA病毒不同，DNA病毒呈持续下降趋势。甘薯曲叶病毒(SPLCV)发病率2003年为5.5%，2011年为59.5%，2012年为47.4%，随后逐年下降，2013年为33.2%，2014年为25.6%。各病毒种感染率均呈下降趋势，2013、2014年病毒感染状况变化较大，但单一感染率较高、混合感染组合比2012年的调查结果变化较大。 2013年的结果显示，最流行的病毒感染是单一感染，占27.6%，其中感染率最高的是甘薯无症状病毒-1（SPSMV-1）（12.9%）。与2013年相比，2014年感染组合更加多样化，共有122种混合感染。