Schmid, J.M; Mata, S. A. 1996. Natural variability of specific forest insect populations and their associated effects in Colorado.

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Beetle-killed trees in the Front Range of Colorado were observed for their rate and direction of falling. No trees fell within the 2 years following infestation. Thereafter, trees generally fell at the rate of 3-5?40 per year unless winds exceeded 75 mph. Most trees fell to the east and broke off between ground level and 2 feet above ground. Keywords: Dendroctonus ponderosae Hopki ns, Pinus ponderosa Management ImpIicationsForest managers need not be concerned with the falling of beetle-killed ponderosa pine until more than 3 years after infestation. Thereafter, strong winds will blow down many trees when winds exceed 75 mph.

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No abstract