Notes: Effects of Dwarf Mistletoe and Vigor Classes on Electrical Resistance in Lodgepole Pine

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Electrical resistance (ER) between steel needle electrodes forced through bark into outermost xylem was measured in lodgepole pines (Pinus contorta) infected by dwarf mistletoe (Arceuthobium americanum) in the greenhouse and field. In the greenhouse, seedlings with bole infections were measured. ER was lowest at the infection, intermediate below, and highest above the infection. In the field, ER of 100-year-old trees of different dwarf mistletoe intensity and vigor ratings was measured at breast height. Trees of poor vigor or those with high mistletoe ratings (class 6) had significantly elevated ER. Forest Sci. 29:124-126.

Keywords: Arceuthobium americanum; Pinus, contorta; vigor

Document Type: Miscellaneous

Affiliations: 32438 North Pine Ave., Grays Lake, IL 60030

Publication date: March 1, 1983

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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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