I have a couple crabapple tress that have something like a fungus growing on...
I have a couple crabapple tress that have something like a fungus growing on all branches and trunk. There are big white-ish spots all over and branches turning black. Some of the branches are dying off. Would this be caused by too much water and are these trees treatable or do they need to come out?
Hennepin County Minnesota lichen on trees
I suspect that your tree is supporting some Lichen. This is a harmless,
interesting mix of a algae and a fungus. Here is a link that will tell you more:
The dead branches may be a sign of a more important problem, however. Please try to send a couple of good quality photos of your tree, and the problem areas and we will attempt to diagnose it.
Thanks for contacting AaE.