Knowledgebase
Flowering Crab Apple Tree #878315
Asked July 22, 2024, 4:46 PM EDT
Otter Tail County Minnesota
Expert Response
This appears to be apple scab.
I suggest cleaning up all fallen leaves from now through the end of the summer. https://extension.umn.edu/plant-diseases/apple-scab
In February hire an ASA certified arborist to prune the tree.
https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional