Sclerophoma pithyophila associated with needle-cast of pines and its connexion with Pullularia pullulans

Severe defoliation of Scots pine by the gall midge Cecidomyia baeri associated with the fungus Sclerophoma pithyophila is described. Culture work supported Robak’s view that a form of Pullularia pullulans is a stage of Sclerophoma. Phoma acicola , quoted by several authorities as synonymous with Sclerophoma pithyophila , occurs under different pathological circumstances from Sclerophoma and is probably less important.