My zucchini plants have these white patches on the leaves. What is causing this, and what can I do to stop it? Thank you in advance! Wanda
What Is Causing White Splotches on Zucchini Plants
It is probably due to high humidity or the inability of the plant to dry after a summer rain. A fungicide will help if you spay often, especially after a rain storm. crowding can be a problem too. It needs good air circulation.
Also try newspaper or cardboard under the plant to avoid rain drops from splashing potentially diseased on the plant.