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Questions About Plum Trees

  • Answered by
    BushDoctor on
    March 12, 2024
    Certified Expert

    This looks like black knot fungus. It is very common in plums, and other related species. Control is quite difficult. You will need to remove any infected growth, and treat with fungicides, near constantly. This can be permanent, as well. Replacing the tree with something else from outside of the Prunus genus would be a more permanent option for control.


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