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Prescribed Burning Reduces Severity of Annosus Root Rot in the South

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Prescribed burning of 14 loblolly and slash pine plantations in the Coastal Plain of the southern United States often reduced losses to Heterobasidion annosum root rot. Plots on which losses were reduced were burned twice before initial stand thinning, and one to three times after thinning. The beneficial effect of fire was greatest where stump infection was assured by inoculation of all fresh stumps with spores of the fungus. Trichoderma spp., fungal competitors of H. annosum, increased in soil after burning. A heavy legume cover, sericea lespedeza, on burned plots did not provide better disease control than burning alone. Forest Sci. 24:93-100.

Keywords: Fomes annosus; Heterobasidion annosum; Lespedeza cuneata; P. elliottii var. elliottii; Pinus taeda; Trichoderma spp; soil microorganisms; soil temperature

Document Type: Journal Article

Affiliations: Research Forester (Fire), Rocky Mountain Forest Experiment Station, USDA Forest Service, Fort Collins, Colorado 85281

Publication date: March 1, 1978

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