Abstract
Insecticide tests to control Contarinia spp. on Douglas-fir were conducted in a small Christmas tree plantation in western Oregon. Acceptable control was achieved with the following materials: endosulfan, dimethoate, lindane (ground spray), carbofuran, and Temik® a 10% granular formulation of UC-21149 (2-methyl-2-(methylthio) propionaldehyde 0 -(methylcarbamoyl) oxime), Adult midge emergence was monitored and was found to provide an index for timing insecticides.
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