I have 2 apples where the bark on trunk is turning black. One is a 4th leaf Liberty from a nursery, the other is a 3rd leaf Wolf River I grafted myself. It definitely seems to be impacting growth. What is it and can it be treated?
The Liberty has started to throw branches below the affected area with one being pretty sizable. My thought is to prune off the whole tree to that large branch below the black spot.
The Wolf River is affected right at the graft union, a few inches below and a few inches above. If I pruned off to below the bad area, I'd just have the rootstock.
Any advice?
Wolf River
Liberty
The Liberty has started to throw branches below the affected area with one being pretty sizable. My thought is to prune off the whole tree to that large branch below the black spot.
The Wolf River is affected right at the graft union, a few inches below and a few inches above. If I pruned off to below the bad area, I'd just have the rootstock.
Any advice?
Wolf River
Liberty