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tree problem

Discussion in 'Pesticide & Herbicide Application' started by vaacutabove, Mar 24, 2012.

  1. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,212

    Black knot of plum. Common, not pretty, but on ornamental plum (or cherry), it is not the end of the world.


    Prune out the cankers a few inches below them. Apply a labeled fungicide to prevent new infections in early spring just before the new leaves come out when temps hit about 55.
  2. baseballfan42093

    baseballfan42093 LawnSite Member
    Posts: 11

    I recently did some research on this (partially because I came across your thread) and I think you may benefit from reading the article I wrote on Black Knot Fungus. There is not a lot of information available for fungal treatment but it's also not too complicated. Best of luck.
  3. vaacutabove

    vaacutabove LawnSite Bronze Member
    Posts: 1,006

    thanks for the info but the tree is long gone now and I have since replaced it with something else.

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