Heterobasidion Root Disease (HRD)- Management

man kneeling by pine seedling with heterobasidion root diseaseHeterobasidion Root Disease will kill not only larger pines but smaller saplings too, like this white pine sapling (Image from Joseph O'Brien, USDA Forest Service, Bugwood.org)
  • Prevention is crucial. If thinning a plantation within several miles of a confirmed HRD location, consider either (1) thinning when temperature is below freezing (32°F) or (2) applying an appropriate fungicide to freshly cut stumps. Spores of Heterobasidion can travel many miles, and the closer to known HRD locations, the greater the risk of infection.
  • Cellu-treat® is the only fungicide in Minnesota currently registered to be used to prevent HRD. One source for ordering this fungicide is the manufacturer's website. Landowners can apply this fungicide on their own land without a license.
  • Any person hired to apply Cellu-treat® needs to be licensed and certified as a commercial pesticide applicator by the Minnesota Department of Agriculture. Learn how to obtain this certification by visiting Minnesota Department of Agriculture website and searching the keywords "pesticide license" or by calling 651-201-6615.
  • Logging equipment arriving at a plantation should be free of soil and woody debris. Equipment should be free of logging debris prior to leaving a site.
  • Keep up-to-date on locations of HRD at this website.

Surveys for HRD by the Minnesota DNR and University of Minnesota are ongoing. If you think HRD is on your property, please consult this identification guide. Report any suspect HRD locations to your local DNR Forestry Office.

Additional Resources

Click to enlarge

map of minnesota showing confirmed HRD in southeast courner of the state

The red dots represent confirmed HRD. The HRD in northern Winona County represents the only known HRD location in Minnesota. (Updated April 6, 2015)