(Corvallis, OR) -- Wildfire smoke can impact wine grapes, and Oregon State University is working on ways to prevent the damage. Researchers are developing a coating for the grapes that keeps the smoke out. In 2020, wildfire smoke cost vintners more than three-billion-dollars in damaged grapes. They're working to develop a spray-on coating that doesn't affect the grapes growth or taste and keeps them from being tainted by the smoke. More testing is needed before the coating is ready to be used on a wide scale.