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Physical barriers to reduce damage by Lepesoma lecontei (Coleoptera: Curculionidae) to conelets in a Douglas-fir seed orchard in western Oregon
- Sexton, J.M., Schowalter, T.D.
- Journal of economic entomology 1991 v.84 no.1 pp. 212-214
- Pseudotsuga menziesii, seed cones, seed predation, mortality, Curculionidae, forest pests, insect control, seed orchards, Oregon
- Damage to Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) conelets by Lepesoma lecontei (Casey) was significantly reduced by the application of a sticky barrier around the bole of the seed orchard trees. Early conelet injury was reduced from 25% in controls to 6% in sticky barrier treatments. No significant protection was observed in a test of a metal baffle placed around the bole. Significant treatment effects on cone survival could not be detected. Sticky barriers are a low-cost control that is highly pest specific and need be applied only to those trees producing a crop in a particular year.