Two of my zucchini plants (black beauty) have leaves that look like this. Does it look like mosaic virus or something else?
Instead, moisture stress. Have you had a heat wave recently? Or did the plant wilt, even though only briefly?
Too much moisture, or not enough?
It has been hot here - in the high 80s and 90s, but that is normal for this area.
Too little. Ran short of water.