I think my beautiful new zucchini plants already have powdery mildew on them. I planted Them from seed directly into the soil around the first week of May along with other seedlings that I had Started indoors a few weeks prior. Anyways, I think a couple of my zucchini plants have powdery mildew. they’ve only had true leaves for a couple of weeks. Ive battled PM before so i am familiar with what it looks like but this looks different. I have Multiple zuke plants in one bed and only two had white on the leaves. I Have been applying a copper fungicide and it has helped one plant tremendously but one is still growing leaves with white along the veins. Sorry for going on and on! I am just upset and annoyed because i put in a lot of work into prepping the beds this year. I like in southeast MI and our weather has been fairly steady and the plants get plenty of sun.