Q.Dusty, White Residue On Leaves
We have a problem with some of our garden getting dusty, white residue on the leaves–mainly zucchini and yellow squash. Is it blight? It’s the same area where all my tomatoes rotted last year and the cucumbers struggled this year.
Certified GKH Gardening Expert
Sounds like a case of powdery mildew. Here is an article that you may find helpful: https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm