June 14, 2017 Vineyard, WSU scientists team up to battle orchard virus threat By Seth Truscott, College of Agricultural, Human and Resource Sciences WAPATO, Wash. – Something in the soil was destroying Andrew Schultz’ grapevines. Clean Plant Center, dagger nematode, enology, grapes, Naidu Rayapati, Tobacco Ringspot Virus, viticulture, Wine