Importance
PLRV is an economically important disease due to the yield loss it can cause. Along with other aphid vectored viruses PLRV causes an annual potato loss in the U.S. of 100 million dollars. Plants that are infected with the virus produce only small to medium tubers that are not preferable in market. When plants are grown from infected tubers yield can be reduced 33-50%. Since potatoes are produced by planting the tubers produced the previous season, PLRV is especially problematic in seed potato production. Plantings from infected tubers will not yield acceptable market quality potatoes and can cause a significant loss. Thus any amount of infection is above the economic threshold. In the United States the potato industry is an important source of revenue, with the top producing states in 2009 being Idaho ($735,250,000), Washington ($627,995,000) and Wisconsin ($246,330,000).
Read more about this topic: Potato Leafroll Virus
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