Can this be cured? Have sprayed with fairy liquid solution.
Certified GKH Gardening Expert
Apple canker is a disease caused by a fungus, Neonectria ditissima, which attacks the bark of apples and some other trees, causing a sunken area of dead bark and, eventually, death of the branch. New cankers form from mid-spring, and once formed are present all year.
Canker is said to be more serious on wet, heavy and/or acid soils, so pay attention to drainage and raise the soil pH by administering lime if needed.
Completely cut out all affected smaller branches and spurs. With the larger branches, try to cut out all infected material. All such pruning should remove all brown, infected bark and wood, cutting back to fresh green tissues. Paint immediately with a protective wound paint
There is no chemical control for Apple Canker.