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1 October 2005 Dose-Dependent Pheromone Responses of Mountain Pine Beetle in Stands of Lodgepole Pine
Daniel R. Miller, B. Staffan Lindgren, John H. Borden, Daniel R. Miller
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Abstract

We conducted seven behavioral choice tests with Lindgren multiple-funnel traps in stands of mature lodgepole pine in British Columbia, from 1988 to 1994, to determine the dose-dependent responses of the mountain pine beetle, Dendroctonus ponderosae Hopkins, to its pheromones. A multifunctional dose-dependent response was exhibited by D. ponderosae to the pheromones cis- and trans-verbenol in areas with low population numbers. In an area with a high population level of D. ponderosae, the response was directly proportional to release rates. No dose-dependent response was exhibited by D. ponderosae to exo-brevicomin at low release rates. At rates of release >0.5 mg/d, exo-brevicomin interrupted the attraction of D. ponderosae in a dose-dependent fashion. The bark beetle predators, Enoclerus sphegeus (F.) and Thanasimus undatulus (Say), showed dose-dependent responses to only a few pheromones, with trap catches directly proportional to release rates. The multi-functional response of D. ponderosae to verbenols is consistent with an optimal attack density hypothesis.

Daniel R. Miller, B. Staffan Lindgren, John H. Borden, and Daniel R. Miller "Dose-Dependent Pheromone Responses of Mountain Pine Beetle in Stands of Lodgepole Pine," Environmental Entomology 34(5), 1019-1027, (1 October 2005). https://doi.org/10.1603/0046-225X(2005)034[1019:DPROMP]2.0.CO;2
Received: 17 March 2005; Accepted: 17 June 2005; Published: 1 October 2005
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KEYWORDS
Cleridae
Dendroctonus ponderosae
exo-brevicomin
verbenols
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