Heterobasidion Root Disease


Heterobasidion Root Disease (HRD)

photo of heterobasidion root disease on truck
Heterobasidion fruiting bodies (i.e. shelf-fungi) growing at the base of a dead pine. (photo from Joseph O'Brien, USDA Forest Service, Bugwood.org).

Heterobasidion Root Disease (HRD), also known as Annosum or Annosus, can be a devastating disease in pine plantations. It was found for the first time in Minnesota in late 2014. The HRD in northern Winona County represents the only known HRD location in Minnesota, as of March 10, 2015. Check the map for locations of HRD.


Pine Planations photo from Joseph O'Brien, USDA Forest Service, Bugwood.org
Pine Planation. (photo from Joseph O'Brien, USDA Forest Service, Bugwood.org).

Quick Facts about Heterobasidion