/ wine quality Content for 色中色 en /news/grapevine-red-blotch-disease-threatens-us-grape-industry <p>色中色, scientists will lead a collaborative effort to study grapevine red blotch disease, which threatens the $162 billion U.S. grape industry. The virus causes red veins and blotches on grape leaves. The fruit on diseased plants is smaller, ripens more slowly, and its sugars and colors are muted.</p> December 10, 2019 - 11:00am Amy M Quinton /news/grapevine-red-blotch-disease-threatens-us-grape-industry