it can be a big problem for zinnias. If your flowers start to look like they've got a white, powdery substance on their ...

Really the only issue with zinnias is a foliar disease, powdery mildew. This mildew will first turn the foliage grayish white and cause it to shrivel, leaving a less than desirable looking plant.

However, it's not a spreader and will grow upright alongside zinnias, so keep that in mind if you're specifically looking for groundcovers. Bee Balm Is Too Susceptible To Powdery Mildew To Be Next ...

A new North Carolina State University study pinpoints the worldwide spread of a fungus that taints blueberry plants with powdery mildew, a disease that reduces blueberry yield and encourages the ...

In the study, Bradshaw and his colleagues examined historic and modern plant leaves plagued by powdery mildew. The collection includes 173 samples from North America, Europe, Africa and Asia; one ...