The life-history is outlined and some existing control methods reviewed. New methods are suggested and the experiments which tested some of them are described. Evidence is given that infection can greatly be reduced by covering conifer stumps, immediately after felling the trees, with a mixture of tar and creosote or with a suitable paint. Some biological control of stump infection is exercised by the purely saprophytic fungus Peniopbora gigantea, but it is not possible at present to suggest a cheap, practical method for facilitating this control. The practical value of the various methods is discussed and the importance of instituting some form of control is emphasized.