Characteristics of Blister Rust Cankers on Eastern White Pine

William R. Phelps; Ray Weber

Treesearch

Characteristics of Blister Rust Cankers on Eastern White Pine

Informally Refereed

Authors:

William R. Phelps, Ray Weber

Year:

1969

Type:

Research Note

Station:

Northern Research Station

Source:

Research Note NC-80. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station

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Download (PDF 811 KB): https://research.fs.usda.gov/download/treesearch/11137.pdf

Abstract

The growth, development, and sporulation of white pine blister rust cankers were studied on eastern white pine in Wisconsin and Minnesota. Three district canker types were identified on the basis of physical appearance, growth rate, and sporulation. Canker growth rate and sporulation decreased as tree size or age increased, and many cankers apparently became inactive. high mortality of branch cankers was associated with older trees, heavily stocked stands, and small branch diameter.

Keywords

Cankers, white pine, blister rust cankers, sporulation

Citation

Phelps, William R.; Weber, Ray. 1969. Characteristics of Blister Rust Cankers on Eastern White Pine. Research Note NC-80. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station