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Incidence of White Pine Blister Rust in a High-Hazard Region of Wisconsin

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Abstract:

The incidence of white pine blister rust, caused by the fungus Cronartium ribicola, was recorded in 61 pole and small sawtimber stands in northern Wisconsin where the risk of infection has long been considered high. A minimum of three, randomly located, 10 basal area factor prism plots were established in each stand. Topographic position, aspect, slope, tree density, habitat type, and the presence or absence of bole cankers were recorded at each plot. The mean incidence of infection was 7.2% for all study sites and 5.9% excluding data from Bayfield Peninsula. Mean incidence of cankered trees at this site was 15.9%. The following site factors were significantly correlated with increased incidence of blister rust: increased latitude, higher topographic position, northern aspect, lower total tree density, and absence of a hardwood overstory. Incidence was almost three times higher on ridge tops and shoulders (12.3%) than on flat or bottomland (4.7%). Habitat type was correlated with disease incidence only at the Bayfield Peninsula site, and slope was not significantly correlated with rust levels on any of the plots. North. J. Appl. For. 18(3):81–86.

Keywords: Cronartium ribicola; bole cankers; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; natural resource management; natural resources; white pine weevil

Document Type: Miscellaneous

Affiliations: Department of Natural Resources, South Central District Office, 3911 Fish Hatchery Rd., Madison, WI, 53711

Publication date: 2001-09-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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