Response of the elm bark beetle,Scolytus multistriatus (Coleoptera: Scolytidae), to component mixtures and doses of the pheromone, multilure

The response of the elm bark beetle,Scolytus multistriatus (Marsham), was measured to various doses and mixtures of the three components of its aggregation pheromone. The ratio of the components released, particularly heptanol to multistriatin, strongly influenced the number, but not the sex ratio, of beetles that responded. We concluded that a bait that released about 400∶ 100∶ 800 μg/day of heptanol-multistriatin-cubebene would be effective in mass-trapping beetles.