Tree has a fungus?
Would you be able to identify the problem with this tree. It's a Buckeye Chestnut - located in the DeWitt City Cemetery, DeWitt, MI, We have several of these trees in the Cemetery. How would we treat them? Two of the trees are within s large flower garden. Thank you.
The tree is not affected by a fungus. The small bumps on the leaves are galls caused by very small insects. Insect-caused galls on plants are considered to be a nuisance. The number of galls will vary from year to year. No pesticide will be effective.
By the way, that tree is not a buckeye chestnut. See http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/chestnuts-horse-chestnuts-and-ohio-buckeyes/
Jean is correct in her diagnosis and that this tree is not a buckeye (Aesculus spp.). This tree is actually Celtis occidentalis, common hackberry, and is a native tree of Michigan. You can learn more about this tree at http://msue.anr.msu.edu/resources/hackberry.
Thank you for using Ask an Expert!