Hello My zucchini had been doing great. After the hot 100* days in late June they went bad. Plants had spots on leaves, and stems got looking like picture. I cut off the bad leaves. Thought it was anthracnose so I sprayed copper fungicide. Don’t know if it helped. Now plants are growing these small leaves and still look bad 10 days later (bottom picture). I also threw out the worse plants Suggestions ? Thank you Jeff