Plant Mold? - Ask Extension
Hi, I have seen two different plants now have a white dust that seems to swell the leave and eventually kills it.
Not sure if this is something sh...
Knowledgebase
Plant Mold? #875608
Asked July 02, 2024, 9:10 AM EDT
Hi, I have seen two different plants now have a white dust that seems to swell the leave and eventually kills it.
Not sure if this is something short term from all the rain or something I need to treat.
Any help would be greatly appreciated.
Wright County Minnesota
Expert Response
Hi,
Your ninebark has powdery mildew. We’re seeing a lot of this in this very wet year. There’s not a lot to do about it except to try to improve air circulation. Consider opening up the center of the plant next spring by pruning out older branches, and make sure to rake up any fallen leaves.
More information is here:
https://hyg.ipm.illinois.edu/article.php?id=1221
Hope this helps.
