Q: This apple tree has yellowing leaves thru-out it so if it’s borers I’m probably too late. Any suggestions?

A: UGA Extension pathologist Elizabeth Little says it’s burr knot, a disease I’ve never seen. (Thank you!) It can weaken trees and serve as an entry point for dogwood borers. However, there is no homeowner solution

Burr Knots on Apples

Burr Knot

apple burr knot

apple burr knot

apple burr knot