VA.PHC

Plant Health Care in Richmond, VA

Inonotus dryadeus

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Sometimes called Oak Bracket or Weeping Conk, this parasitic saprobic fungus is found at the base of an old willow oak tree. It’s a white rot fungus, causing decay of the roots and trunk. The fungal blob you see on the tree is the fruiting body. Fruiting from summer till fall. When the fruiting body is young, it will secrete this orange-amber ooze from little tubes in the body of the mushroom. When the liquid dries it leaves these sunken, shallow dimples.

The spores of this fungus enter a tree from wounds. In an urban environment, this is most often some type of mechanical wound. Other broadleaf trees can get this fungus as well, just more common in oaks. This is a moderate to slowly progressing root rot, which will eventually lead to root failure.

According to, Wiki via “A Field Guide to Insects and Diseases of California Oaks”, Presence of a fruit body may indicate that the mycelium has penetrated and weakened the root crown of the tree.

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Written by vaphc

September 22, 2012 at 6:14 pm

Posted in Uncategorized

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