Root Decay in Urban Trees: Berkeley's Polypore

摘要

It is September and your client has a two-foot-diameter, 30-pound mushroom growing from the base of their oak (Photograph 1 and la). They are wondering what it is doing to the tree andwhy you can't identify this gigantic and obtrusive fungus in their backyard. It can only be one pathogen, Berkeley's poly-pore (Bondarzewia berkeleyi, previously named Polyporus berkeleyi).