Evaluating High Release Rate MCH (3-Methylcyclohex-2-en-1-one) Treatments for ReducingDendroctonus pseudotsugae(Coleoptera: Curculionidae) Infestations

Current recommendations for applying the antiaggregation pheromone 3-methylcyclohex-2-en-1-one (MCH) to protect live trees from Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, infestation are to space individual passive releasers (MCH bubble capsules) on a 12- by 12-m grid throughout areas to be protected. Previous field studies and a theoretical study using a puff dispersion model to predict pheromone concentrations have shown that...