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Butt Rot in Yellow-Poplar Seedling-Sprout Stands

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Each of 212 yellow-poplar sprout clumps studied had one live and one dead sprout. Butt rot was present in 26 percent of the living stems. Live stem ages ranged from 12 to 45 years. The dead sprout had died of suppression and its stage of decay rather than its size indicated the probability of butt rot in the associated live stem. A heartwood connection between the sprouts preceded the spread of decay from the dead sprout into the butt of the living stem. Pathological heartwood formed where stems were closely appressed and increased the area of heartwood contact between such stems. Vigor index, crown class, diameter, total height, and rate of radial growth of live stems were inversely related to butt rot incidence. Armillaria mellea and other Hymenomycetes were isolated from areas of white and brown rot in 11 of 56 live stems. Bacteria and Fungi Imperfecti, particularly Fusarium spp., Margarinomyces spp., and Trichoderma lignorum, were often isolated from discolored wood other than that showing white or brown rot. Management proposals based on experimental plot data should be considered applicable only on silviculturally similar areas. Removal of low-vigor sprout clumps or of suppressed stems of a clump before their diameter exceeds two inches is recommended on the basis of this study.
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Document Type: Journal Article

Affiliations: Professor of Plant Pathology, West Virginia Univ. Agric. Expt. Sta., Morgantown

Publication date: 1967-12-01

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    Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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