Potato virus Y is the most serious threat to potatosome strains more than others

Potato virus Y (PVY) is the most serious problem facing the potato industry in the United States and is the main cause for rejection of seed potato lots. The virus affects potatoes in two ways: It reduces the yield of potato tubers by 70-80% and also negatively affects the quality of the remaining tubers due to necrotic reactions.

source https://www.lifetechnology.com/blogs/life-technology-science-news/potato-virus-y-is-the-most-serious-threat-to-potatosome-strains-more-than-others