Windtunnel and field observations of western spruce budworm responses to pheromone-baited traps

Five trap designs, the Pherocon 1CP, a triangular trap, dome trap, double cone trap and Kendall trap were evaluated for capturing the western spruce budworm, <i>Choristoneura occidentalis</i> Freeman, both in a laboratory-based windtunnel and in an infested stand. Neutral density smoke tests showed the effects of orientation to wind on plume formation as well as highlighting plume structure around larger traps. Moth capture rates in the windtunnel did not always correlate with capture rates under field conditions

Early season apple pest management: Control of two species of scales (Homo.: Diaspididae) and bruce spanworm (Lep.: Geometridae) with methidathion

The organophosphate insecticide, methidathion, proved to be more efficacious for the control of San Jose scale (Quadraspidiotus perniciosus (Comstock)) and European fruit scale (Q. ostraeformis (Curtis)) than dormant oil when applied at the tight cluster stage of bud development. The compound also provided effective control of Bruce spanworm (Operophtera bruceata (Hulst)) and did not cause excessive mortality of the predaceous mites responsible for the biological control of orchard phytophagous mites. Methidathion use could be integrated into existing orchard pest management programs by using currently accepted sampling schemes for the above pest organisms to determine when thresholds requiring treatment  have been exceeded

Windtunnel and field observations of western spruce budworm responses to pheromone-baited traps

Five trap designs, the Pherocon 1CP, a triangular trap, dome trap, double cone trap and Kendall trap were evaluated for capturing the western spruce budworm, Choristoneura occidentalis Freeman, both in a laboratory-based windtunnel and in an infested stand. Neutral density smoke tests showed the effects of orientation to wind on plume formation as well as highlighting plume structure around larger traps. Moth capture rates in the windtunnel did not always correlate with capture rates under field conditions