These are H. erinaceus , P. sapidus , P. fissilis , and L. sulphureus . These and other fungi can be identified by the conks they produce. Identifying the Injury. Most begins at basal injuries, like those caused by fire and logging damage. In addition, poorly healed and decayed branch stubs and other stem defects are strong indications of heart rot.
Healing is slow and permits a succession of chemical changes, and bacterial and fungal colonization.
If the succession is complete, decay will be initiated and will continue for many years. Once the decay process begins, there is no control. Consequently, prevention through the reduction of wounds from all agents is crucial to controlling heart rot. Affected trees that have any merchantable volume should be salvaged, while those that do not should be felled or girdled. Heart rot developing on oak sprouts.