Abstract
AbstractThe behavioral responses of male spruce budworm moths to a wide range of loadings of synthetic sex pheromone on filter paper and rubber septa were investigated in a wind tunnel. The highest proportion of males flying upwind and reaching filter-paper dispensers occurred at pheromone loadings of between 0.1 and 10 μg. Above these loadings, males were activated but upwind flight was arrested before the moths reached the pheromone source. No such arrestment occurred with rubber septa up to the maximum loading assayed, 1 mg. Up to 72% of the males that reached a septum attempted to copulate with it, but even this response was less than that to a septum in the presence of pheromone emitted by females. This confirms previous conclusions that the synthetic pheromone blend used here, 95:5 (E:Z-11-tetradecenal) is incomplete.
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