Black knot fungus

Applause IconApr 30, 2019 • 4:20 PM UTC
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Puchina

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This knotty, black growth on a tree branch is black knot fungus ( Dibotryon morbosum). It infects cherry, plum, apricot and chokecherry trees and kills the infected part of the tree and provides a habitat for insects. Treatment is fungicides and cutting the affected branch several centimetres below the infected site.

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