Apple – Burr Knot on Trunk
Q: I have black warty growths all over my Fuji apple tree. I think it’s “burr knot”. I’ve removed most of the knots with chisel. Can I save my apple tree?
A: I think you have diagnosed the problem exactly right. I’ve seen these galls on apple trees before but never knew what they were called.
All the references I see say to chisel or somehow physically remove the gall and hope the tree heals over the wound.
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