Carbaryl Prevents Attacks on Lodgepole Pine by the Mountain Pine Beetle
Abstract:A pilot project was conducted during 1977 on the Targhee National Forest, Idaho, to test the effectiveness of carbaryl insecticide in preventing attacks by the mountain pine beetle (Dendroctonus ponderosae) in lodgepole pine (Pinus contorta). For comparison, lindane was applied to alternate blocks of trees. The insecticides were applied as water-based sprays using hand-held spray apparatus. Carbaryl was applied at 2.0 percent, and lindane at 1.3 percent. Success of each chemical was based on comparisons between treated trees and adjacent untreated ones. Carbaryl was 100-percent effective while lindane was only 45-percent effective. Follow-up evaluations after beetle flight in 1978 and 1979 showed a single treatment of carbaryl was 98.4-percent effective in preventing beetle attacks after a second season but only 66.6-percent effective following a third season. In stands of high-value trees, carbaryl can be a safe, economical, and highly efficient way to protect individual trees.
Document Type: Journal Article
Affiliations: An Entomologist, Forest Pest Management, U.S. Forest Service, Albuquerque, NM.
Publication date: February 1, 1985
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