What is this white powder on the leaves of my zinnia plants?
by
Diana
+1
White powder on leaves of my zinnia s in garden...What is it?
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Sounds like powdery mildew. This is our DIY fungicide that can help with that: https://chemistrycachet.com/easy-homemade-fungicide-spray-for-plants/
I agree, powdery mildew.
If not powdery mildew could be white flies larvae.
powdery mildew. When you first see the slightest sign of it spray with milk. Yes milk. When it has gone beyond first stage there is a spray for it sold in garden centers. It attacks so many plants, most vines like cucumbers, squash also peonies, and lilac. The spores are airborne and although ugly doesn't harm most plants. When you cut off areas with it wash your utensils because you can spread it. My zinnias are covered with it this year.