Why is my maple tree bark turning white?
David Ramirez
Published May 27, 2026
Why is my maple tree bark turning white?
Bacterial Wetwood. Also called slime flux, bacterial wetwood is a disease that causes yellowish-brown wood discoloration and foul-smelling slime to ooze out of the bark. The slime can be clear or white and frothy. When the slime dries, it leaves a white or grayish crust on the bark of the maple tree.
How do you treat maple bark fungus?
Treatment: No cure, but some trees can recover with proper care. In severe cases, remove tree, fumigate soil, and plant a wilt-resistant species in its place. The best treatment is prevention through proper maintenance.
How do you get rid of mold on Japanese maples?
If you find your Japanese maple, crape myrtle, or dogwood have powdery mildew, try to remove as much of the infected leaf as you can, and avoid overhead watering. Increasing the air movement around the plant by pruning overgrown branches or vegetation can help as well.
What do white spots on Japanese maple look like?
What if those white spots are on the trunk, too? Lichens look like fuzzy patches on tree trunks . They’re typically found on slow-growing trees like the Japanese maple, so spotting them shouldn’t be a cause for concern.
Can a Japanese maple tree be infected with fungus?
Trees can be severely infected and look as if they are dying but rarely suffer long-term harm; however, the shrubs need to be watched closely, as they can sometimes succumb to an infestation. But surprisingly, proper care of the tree or shrub is the key to restoring it to vigorous health.
What do lichens look like on Japanese maple?
Lichens look like fuzzy patches on tree trunks. They’re typically found on slow-growing trees like the Japanese maple, so spotting them shouldn’t be a cause for concern. How can I get rid of these Japanese maple leaf issues?
What kind of bark does a Japanese maple tree have?
The bark is smooth and gray on older limbs, but green, red or sometimes pink on younger shoots. This tree grows in the shade of larger forest trees, which is why it is more shade-tolerant than most other deciduous trees.
What if those white spots are on the trunk, too? Lichens look like fuzzy patches on tree trunks . They’re typically found on slow-growing trees like the Japanese maple, so spotting them shouldn’t be a cause for concern.
What kind of fungus is on leaves of Japanese maple?
Powdery mildew appears as a white or gray fungal substance throughout the leaves, stems, flowers and fruit of a plant. The Ohio State University Extension service notes that leaves may curl or twist even before the white fungus is apparent.
Lichens look like fuzzy patches on tree trunks. They’re typically found on slow-growing trees like the Japanese maple, so spotting them shouldn’t be a cause for concern. How can I get rid of these Japanese maple leaf issues?
Can a Japanese maple tree be disease resistant?
Japanese maples are actually pretty tough trees and quite disease resistant. Usually, if a Japanese maple is failing, or doesn’t look good, it’s not from disease but other issues that are pretty easy to correct. First let’s look at the things that you can control.