I have a cherry tree (Stella). Its 14 years old and I’ve found out it has canker. One is pretty significant and another two are on the branch collar of the lowest branches. Can you tell me what I should do short of cutting the tree down.
Canker is a bacterial fungi commonly found on fruit trees particularly those with stoned fruits. It is difficult to manage. However, it is possible to save the tree by cutting away diseased tissue, especially if found on the trunk. Small branches that are infected can be pruned out where possible. This needs to be done in the dormant season, where infection is less than 50% of branch circumference. Removed branches and wood should be burned or chopped in to small pieces to avoid spreading. Cutting tools need to be clean & sharp.
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