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J Chem Ecol

Title:		Sensitivity of antennae of male and femaleIps paraconfusus (Coleoptera: Scolytidae) to its pheromone and other behavior-modifying chemicals
Author(s):		Light DM;
Address:		"Department of Entomology, University of California, 95616, Davis, California"
Journal Title:		J Chem Ecol
Year:		1983
Volume:		9
Issue:		5
Page Number:		585 - 606
DOI:		10.1007/BF00990411
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"The antennal sensitivities of both male and femaleIps paraconfusus were found generally to be greatest for conspecific aggregation pheromones (ipsdienol, ipsenol); intermediate for an additional conspecific pheromone (cis-verbenol), an aggregation synergist (2-phenylethanol), and pheromones/allomones of sympatric species (trans-verbenol, verbenone, and frontalin); and lowest for both host terpenes (alpha-pinene and myrcene) and other bark beetle-produced odorants (exo-brevicomin and linalool). Of the enantiomeric compounds tested, antennae of both sexes did not differ in sensitivity between thetrans-verbenol enantiomers at low dosage levels; but at higher dosages, the conspecific-produced enantiomer, (1R,4S,5R)-(+)-trans-verbenol, elicited larger mean EAG responses than its antipode, (1S,4R, 5S)-(-)-trans-verbenol. At the mid-dosage range, female antennae tended to be slightly more responsive to (S)-(-)-verbenone than to (R)-(+)-verbenone, while male antennae were equally responsive to stimulations by either verbenone enantiomer. In field bioassays there was a large and significant reduction in trap catches ofI. paraconfusus on traps where the (S)-(-)- or (R)-(+)-enantiomers of verbenone were evaporated beside logs containing boring conspecific males. Only when the (S)-(-)-enantiomer of verbenone was evaporated beside logs containing boring males did the sex ratio ofI. paraconfusus trapped shift from female-dominated to male-dominated attraction. Thus both physiological and behavioral data suggest a differential chiral sensitivity of female beetles for the verbenone enantiomers. The relative sensitivities between different chiral compounds derived from one or the other of the common precursoral host terpenes, (S)-(-)- and (R)-(+)alpha-pinene or myrcene, are discussed"
Keywords:
Notes:		"PubMed-not-MEDLINELight, D M eng 1983/05/01 J Chem Ecol. 1983 May; 9(5):585-606. doi: 10.1007/BF00990411"