I’m an amateur grape grower. It’s my first time growing pinot noir vines. My vines were coming along fine and then all of a sudden the leaves are curling and vines have black spots. What can I do??
Denden, where are you located in california? I am in Northern California in Rocklin.I agree with Busabill - the stems/canes look like powdery mildew. This is easily fixed with sulfur here in California.
My bigger concern is the curling leaves. This is not leafroll (GLD). It looks like curly leaf, but I have only seen curly leaf on fruit trees.
Get some sulfur on your vines now, and in the winter, use a copper-oil type treatment on the dormant vines and you will be fine. We are lucky in California that we do not need to spray much. I do sulfur about 3 times a year and that is all that is needed.
Would a Neem oil work ? Any recommendations for the pest/leaf portion? Thanks for all the help.I agree with Denden, the leaf curl is concerning and that is not powdery mildew. Likely some sort of pest. Definitely use some sort of horticulture oil treatment in concert with the copper or sulfur for the powdery mildew and you will be fine.