Heterobasidion Root Disease Interactive Guide
Result
HRD is not present in the stand AND the stand IS within 25 miles of a confirmed HRD stand.
Learn more in Chapter 3 of the HRD guidelines.
Recommendation
If harvesting occurs from April 1–November 30, preventive stump treatment on pine and spruce is recommended if more than 50% of the stand is pine and/or spruce. The minimum tree size for treatment is merchantable size. No treatment is required from December 1–March 31. Harvesting without preventive stump treatment can be considered April 1–November 30 under certain conditions listed as Exceptions or Modifications.
Exceptions/Modifications
Chapter 3, Modification 3 may be utilized and you may choose not to apply the preventative stump treatment, but there are some things to carefully consider and you should discuss this with a forester or DNR forest health specialist. Chapter 3, Modification 3 states that treatment may not be required because the stand is near final harvest (within 10 years) AND the regeneration plan for the stand will be less than 50% pine and/or spruce combined or pine and/or spruce will not be an important component of the regeneration plan after the final harvest.
Modifications are considered to be stand-specific, and consultation with a forester and/or forest health staff in your area is recommended to assess applicability.
Justification for Modifications should be documented and included in the normal approval process for harvesting. For public lands, justification for using a Modification must be included in Form 2460-001 (Timber Sale Notice and Cutting Report). For Managed Forest Law and Forest Crop Law lands, it should be included in Form 2450-032 (Cutting Notice and Report of Wood Product). If the Exception/Modification requires a change in these forms, justifications should be added accordingly.
Things to consider
If you choose to harvest during April 1–November 30 without stump treatment, consider the potential impact to the stand and subsequently to adjacent stands if HRD were to develop in the stand. It is important to note that there are no treatments to eradicate the pathogen after it infests a stand.