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Old 07-01-2013, 09:14 PM
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RigglePLC RigglePLC is offline
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Join Date: Jul 2006
Location: Grand Rapids MI
Posts: 10,953
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.
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Old 07-18-2013, 10:26 AM
baseballfan42093 baseballfan42093 is offline
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Join Date: Mar 2013
Location: Plainville, MA
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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.
CMO, Co-Owner, Operator
Lawn in Order Landscaping Inc.
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Old 07-21-2013, 07:52 PM
vaacutabove vaacutabove is offline
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Join Date: Jul 2010
Location: forest va
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thanks for the info but the tree is long gone now and I have since replaced it with something else.
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