Short-range horizontal disruption by verbenone in attraction of mountain pine beetle (Coleoptera: Scolytidae) to pheromone-baited funnel traps in stands of lodgepole pine

Verbenone interrupted the attraction of mountain pine beetle, Dendroctonus ponderosae Hopkins, to baited multiple-funnel traps at a distance of or = 4 m from traps with verbenone wcre not significantly lower than catches in control traps. These results are consistent with the short-range phenomenon of "switching" exhibited by mountain pine beetle in the formation of a spot infestation in stands of lodgepole pine. Keywords: Dendroctonus ponderosae; Coleoptera; Scolytidae; verbenone; antiaggregation pheromone; multiple funnel trap