Powdery Mildew on Grapes
Hello! I'm a novice gardener, and have had grapevines in my backyard for the past 3 years. I've never had any issues in previous years but my grapes have recently gotten powdery mildew on 3 of the 4 plants. From what I've read online, there are products that can prevent it from spreading to the other plants, but I haven't found any information as to what to do with the plants once they have the mildew. Most of the grapes have the powdery coating on them and the leaves are slightly curled and discolored. What do I need to do to prevent this from happening again? Are the vines a total loss? I'd hate to have to remove them and start over, but I'll do what I need to do. I have 2 plants of Thompson's seedless green grapes, 1 Concord grape plant and 1 red grape plant. I'm assuming that my total crop is a loss this year...I doubt the grapes are edible now.
Thanks for any info!