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Linda Joyce
Rocky Mountain Research Station
240 West Prospect
Fort Collins, CO 80526
Phone: 970-498-2560
 United States Department of Agriculture Forest Service.USDA logo which links to the department's national site.Forest Service logo which links to the agency's national site.
Pine Beetle Treatments      Go Back!
Solar radiation treatment is an environmentally safe way to kill Mountain pine beetles. Beetle infested trees should be felled in June and bucked into four foot length for easy handling and laid on the ground in an open area where the sun can heat up the bark. Rotate the logs 1/3 of turn, once every week  before beetle emergence begins in late July. Our research results indicated that this method has resulted in better than 95% beetle mortality.



Field tests of insecticides in 1982 determined that spraying green high value trees with 2% emulsion of carbaryl, as Union Carbide Sevimol-4 to thirty feet can protect the tree from beetle attacks (these were the results of research only, and mention of a proprietary product or pesticide does not constitute an endorsement or recommendation by the USDA). New insecticides are now being tested that will produce comparable results at less cost to the consumer.



Even-aged stands with an average diameter greater than 8 inches d.b.h. and growing stock level (GSL) of more than 150 sq. ft. per acre are considered highly susceptible to mountain pine beetle attacks. Thinning the stands to a 100 basal foot per acre or less can increase protection against beetle attacks.
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