The pathogenicity of Ceratocystis montia to lodgepole pine

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Abstract
Ceratocystis montia (Rumb.) Hunt, an ascomycetous fungus, is associated with bark beetle infested lodgepole pine in the intermountain region of United States and portions of western Canada. The organism, when inoculated into lodgepole pine (20 years old) caused necrosis of the inner bark, a blue-stained appearance of the sapwood, and chlorosis and necrosis of the foliage. Koch's postulates were fulfilled in these experiments. Particles of inner bark provided the best support for fungal growth and inhibitors of fungal growth may develop in sapwood during the process of drying.