A new disease of red pine has recently been found in southern Connecticut, Rhode Island, eastern Massachusetts, western and central New York, northern New Jersey, eastern Pennsylvania, central Ohio, and southern Michigan. It is of serious consequence only on plantation-grown red pine, but it also occurs occasionally on eastern white pine. On the former host it is characterized by axially elongated, annual main-stem cankers which are always centered at the nodes. Infection takes place through adhering lateral dead branches and the growth of the fungus after it gains entrance to the stem.is usually very rapid-Le., cankers up to three feet in length may be formed in one year's time. Infection of red pine has been found only where the tree has been planted south of its optimum range.
Hansbrough, John Raymond. 1936. The Tympanis Canker of Red Pine. Yale School of Forestry Bulletin 43. ix, 58 pp + plates.