Frillylily said:well whatever it is, my tree is doing poorly, I do have large cedars just 100 ft from the tree. Mine looks like the OP photo, the leaves turn yellow/orangish and spotted and fall off when it gets hot out. So how to tell the diff in what a tree has?
I wondered if your tree is doing any better? I have this variety, too. The mottled gold / orange fall coloration and the bark are two of the ornamental features of this crabapple along with the gorgeous flowers and oval red fruit.
http://www.onlineplantguide.co...
Missouri botanical garden says of it "Generally, 'Robinson' has excellent disease resistance to the main diseases of crabapples."
http://www.missouribotanicalga...
However, the Maine cooperative extension service gives it only a "Good" rating for Apple scab.
https://extension.umaine.edu/p...
