Collar crack of birch

Alex L. Shigo

Treesearch

Collar crack of birch

Informally Refereed

Authors:

Alex L. Shigo

Year:

1964

Type:

Research Note

Station:

Northern Research Station

Source:

Research Note NE-22. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 1-4

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Download (PDF 502 KB): https://research.fs.usda.gov/download/treesearch/11887.pdf

Abstract

The name "Collar crack" is suggested for a condition of birches observed in the past 4 years during field studies of forest disease problems in the White Mountains of New Hampshire. The first close observations of this condition were made during the summer of 1963. This is a report on those observations and an explanation of the possible cause.

Citation

Shigo, Alex L. 1964. Collar crack of birch. Research Note NE-22. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 1-4