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J Chem Ecol

Title:		"Response of mountain pine beetle,Dendroctonus ponderosae Hopkins, and pine engraver,Ips pint (SAY), to ipsdienol in southwestern British Columbia"
Author(s):		Hunt DW; Borden JH;
Address:		"Department of Entomology, University of Wisconsin, 53706, Madison, Wisconsin"
Journal Title:		J Chem Ecol
Year:		1988
Volume:		14
Issue:		1
Page Number:		277 - 293
DOI:		10.1007/BF01022547
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"In bioassays conducted with walking beetles in the laboratory (S)-(+)-, (R)-(-)-, and (+/-)-ipsdienol were attractive alone, but reduced the attraction of both sexes of the mountain pine beetle,Dendroctonus ponderosae Hopkins, to extracts of female frass. Field trapping studies indicated that attraction ofD. ponderosae to a stimulus composed of myrcene +trans-verbenol +exo-brevicomin was significantly reduced with the addition of (+/-)- and sometimes (S)-(+/-)-ipsdienol. Thus, (S)-(+)-ipsdienol produced by males of this species may act as an antiaggregation pheromone. (S)-(+)-Ips-dienol is thought to function as a repellent allomone against the pine engraver,Ips pini (Say), in regions whereI. pini utilizes (R)-(-)-ipsdienol as an aggregation pheromone. However, in southwestern British ColumbiaI. pini was attracted to the (+/-)-ipsdienol used in field bioassays ofD. ponderosae, a finding consistent with the production of both enantiomers byI. pini in this region. When presented with the ternary semiochemical bait forD. ponderosae, (+/-)-ipsdienol was not attractive toI. pini. Thus, the activity of (S)-(+)-ipsdienol as a repellent allomone againstI. pini seems to be replaced in southwestern British Columbia by the inhibitory effects of myrcene,trans-verbenol,exo-brevicomin, or some combination thereof"
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Notes:		"PubMed-not-MEDLINEHunt, D W Borden, J H eng 1988/01/01 J Chem Ecol. 1988 Jan; 14(1):277-93. doi: 10.1007/BF01022547"