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Observational study examines growth forms and blight factors in American chestnut trees, suggesting limited impact from three key characteristics.
A total of 480 individual trees and sprouts comprising some 204 clones of Castanea dentata were studied in the Southern Appalachians. A descriptive growth-form system was developed. Six tree characteristics were recorded to determine if they were related to blight (Endothia parasitica) incidence (presence or absence of cankers). In analysis of the data a regression equation was evolved with three of the characteristics (circumference, bark rupture, and total height) making a significant contribution. However, only ten percent of the total variation in blight incidence was accounted for by these three variables.
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Macdonald et al. (1967) studied this question.
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