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Home → Publications → American Chestnut Proceedings → 1982 → Summary Research on Biology of Hypovirulent and Virulent Endothia Parasitica on Blight-Resistant and Blight-Susceptible Chestnut Trees at Virginia Polytechnic Institute and State University

Summary Research on Biology of Hypovirulent and Virulent Endothia Parasitica on Blight-Resistant and Blight-Susceptible Chestnut Trees at Virginia Polytechnic Institute and State University

ABSTRACT.--Evidence is presented that some degree of blight resistance may be present in a large, surviving American chestnut tree. The evidence includes results of inoculations of stems excised from the tree, of grafted scions of the tree, and of the intact tree, including microscopical observations of such cankers. Additionally, the lengths of naturally caused cankers on the tree were measured over a 3-year period and seedlings of other large, surviving American chestnuts were inoculated. Results also are outlined of histopathological examination of the development of cankers incited by a virulent (V) and a hypovirulent (H) strain of Endothia parasitica on blight-resistant Chinese chestnut and blight-susceptible American chestnut,as are studies of epidemics of V strains of E. parasitica on American chestnut and an experiment on biocontrol by H strains of cankers caused by V strains.


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Author(s): Frederick V. Hebard, Gary J. Griffin, John Rush Elkins

Publication: American Chestnut Proceedings - 1982