Add Yahoo as a preferred source to see more of our stories on Google. Close up of powdery mildew fungi on plant leaf - Dulanja Omesh/Shutterstock If you've started to notice tiny, white, powdery, or ...

You might be noticing powdery mildew (a disease that causes a grayish, powdery film on leaves) in your garden. Common plants that could be affected are lilacs, phlox, bee balm, zinnias and nannyberry ...