MIldew, fungus everywhere on trees, wooden fences!

Asked October 25, 2017, 11:28 AM EDT

Can trees & wooden fence with a fungus spread to my vegetable garden? My vegetables all had powdery mildew. It seems to be killing my Japanese maple.

Anne Arundel County Maryland powdery mildew lichens vegetable fungus everywhere

1 Response

No. There are many different varieties of fungus, some are of concern, but most are not.
You may be seeing some lichens on trees and fences, and they are completely harmless and a sign of good air quality.
Here is a page about them: https://extension.umd.edu/hgic/lichens-trees-and-shrubs

For your vegetables, refer to these pages on vegetable plant profiles, and see the "common problems" for each of them: https://extension.umd.edu/hgic/plants/vegetable-crops

Japanese maples can have many problems. While you may see some powdery mildew, it's likely there are other problems that are of greater concern. If you'd like to send us photos of what is going on, we'd be happy to take a look.

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