Recent Examples of powdery mildew from the Web
Also keep a fungicide handy to apply as needed — Hydrangeas often suffer from powdery mildew and leaf spots.
The spores of such fungal diseases as black spot, rust and powdery mildew may be lurking on dead leaves or atop old mulch.
Topping that list: spider mites and powdery mildew.
Fungal disease: Cool nights and hot, sunny days may result in powdery mildew on some of your susceptible roses.
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