Canadian Forest Service Publications
Effect of spacing in lodgepole pine stands on incidence of Atropellis canker. 1986. Stanek, W.; Hopkins, J.C.; Simmons, C.S. The Forestry Chronicle 62(2): 91-95.
Issued by: Pacific Forestry Centre
Catalog ID: 2619
Atropellis cankers on lodgepole pine were counted in Alberta plots spaced to 500, 1000, 2000, 4000 or 8000 trees per hectare. Cankers were counted just after thinning in 1967, and again in 1969, 1971 and 1983. After spacing, fewest cankers developed at 500 trees per hectare, most at 4000 and 8000 per hectare. Number of cankers developed after spacing was directly related to stand density, linearly when both were transformed to logarithmic scales, and was unrelated to site aspect. Atropellis cankers were found most frequently or the north and northwest sides of stems. Spacing as a control measure is recommended.