Hello all, If anyone can help me with my grapevine problem I'd be really grateful. I just came back to my garden after a couple of months and almost all of the vine leaves are brown in parts and fragile. A neighbour said that the vines might be getting too much water, but I looked at the new green leaves and they have patches of white fungus on them (pictured). i'm pretty sure these are the parts that go yellow, then brown and die. Any ideas what the problem might be? Thanks so much in advance for any help! James
First guess: Downy Mildew, second guess powdery mildew. Try googling both with +grape and go to the images to compare the up close details of the affected parts. Ralph