Spots on Zucchini Plant Leaves
A friend and I noticed plants getting a lot of white spots on plants and then leaves begin dying.
Certified GKH Gardening Expert
If the white spots are powdery, then this is powdery mildew. This article will help:
If the white spots are small and concentrated in groups, it is likely mealybugs or a related pest. These articles will help with that: