Powdery mildew of summer squash

The picture is dull and easily confused with silver leaf disease.

Sorry to correct it: the initial spot in the lower right corner is not a small round pink spot, which does not meet the symptoms of powdery mildew. The back of the leaf is normal, and the whole leaf is silver. According to various characteristics, it is silver leaf disease of zucchini. I can't see the reflection at first sight because the light of the photo affects my judgment.

Combined with the curly leaves in the picture, it is silver leaf disease.

Avermectin plus pymetrozine plus aminoglycosides for chemical control is a little late in general.

You are welcome!