Yep. It’s happened again. Powdery Mildew. It’s the #1 disease among grapevines and it’s more prevalent in cooler climates. It’s a fungus. It can ruin a cluster, a vine, a lot or even an entire vineyard.
We had about 7 of 50 plants affected last year. We did not use a fungicide. This year we did use fungicide as mentioned in a previous post. We sprayed several times but it was too late to control. Now we have 75% or more of our vineyard now affected. Both Chardonnay and Pinot Noir showing signs of mildew.
The fruit afflicted with this disease will not render a good harvest. Fruit set will be poor and they will not ripen well or evenly. Here’s how it looks:
