Root Rot Part 5:Don't mess with Inonotus dryadeus

摘要

The warted polypore (aka weeping conk or weeping polypore) Inonotus dryadeus is one of the more insidious and difficult to manage root-decay pathogens of urban trees.The fungus is common on oaks (less common on other hardwoods) throughout the United States (Photo 1) and is reported on conifers in the Northwest. It is particularly common on oaks in southern states east of the Rocky Mountains. The fungus acts primarilyas a structural root decayleading to windthrow or failure of the entire tree at the soil line or from decayed buttress roots (Photo 2).