Title:	Limonene: attractant kairomone for white pine cone beetles (Coleoptera: Scolytidae) in an Eastern white pine seed orchard in Western North Carolina
Author(s):	Miller, Daniel R.
Date:	2007
Source:	J. Econ, Entomol, Vol. 100(3): 815-822
Description:	I report on the attraction of the white pine cone beetle, Canophthorus coniperda (Schwarz) (Coleoptera: Scolytidae), to traps baited with the host monoterpene limonene in western North Carolina. Both (+)- and (-)-limonene attracted male and female cone beetles to Japenese beetle traps in an eastern white pine, Pinus strobus L. seed orchard near Murphy, NC. Catches of cone beetles were directly proportional to the release rate of (-)-limonene; (+)-limonene was not rested for dose resposne. Attraction of cone beetles to the pheromone (+-)-trans-pityol was increased significantly by both enantiomers of limonen. In all experiments, catches of C. coniperda were strongly male biased with no treatment effect on sex ration. (-)-limonene had no effect on trap catches of the predator Enoclerus nigripes (say) to pityol, whereas (+)-limonene interrupted the attraction of E. nigripes to traps baited with pityol. Of six monoterpenes commonly found in white pine cones, only (-)-a-pinene elicited attraction of E. nigripes to Japanese beetle traps.
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