Flowering crab problem
Hello- I have a flowering crab in my backyard that is dropping some leaves this summer. The tree still looks full and green at this point but I am concerned about the dead leaves because this is new. Also, the leaves on the tree have spots. What is this? And, what should I do for it? Thanks.
Hennepin County Minnesota
Although we can't be sure by viewing a photo, two kinds of leaf diseases appear to be present--scab and black rot. Please compare your tree's symptoms with the photos and descriptions shown in the following diagnostic tool and see what you think. If you conclude that one or both are affecting the tree, follow the control methods recommended in the bulletins linked to the diagnostic tool.