Leaves Have White Spots

Question

We have just a few zucchini squash and have been treating with Sevin dust. But now we have white spots on the leaves. No bugs are seen. Could this be from a fungus?

Answer 1

This sounds like powdery mildew. Here is some articles that can help with that:
https://www.gardeningknowhow.com/problems/get-the-cure-for-powdery-mildew.htm
https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm