Abstract
Abstract Aerial applications of esfenvalerate in a Douglas-fir seed orchard in the Oakridge Ranger District of the Willamette National Forest are used to evaluate the effectiveness of insecticide treatments to control seed and cone insects of Douglas fir. Data from Kromekote spray deposition cards are compared with canopy penetration and deposition predictions from FSCBG, a Forest Service computer model that predicts the behavior of pesticide sprays released from aircraft. Predictions of canopy penetration and ground deposition am within an average of 7.8% of the overall field dataset. These results demonstrate the usefulness of the simulation model for selecting spray application parameters and describing the environmental distribution of pesticides.
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