Abstract
For some species, chemical analogs have been identified that can substitute for the major pheromone component and reduce pheromone-trap captures in atmospheric permeation experiments. The ability to substitute these analogs for the major pheromone component in field tests raises the question: Do the same set of olfactory receptor neurons on the insects' antennae respond to both the major component and the effective structural analogs? To investigate this question, extracellular responses were recorded from single sensilla on the antennae of maleHeliothis zea (Boddie) (Lepidoptera: Noctuidae) to stimulation with increasing doses of (Z)-11-hexadecenal, the major pheromone component, (Z)-9-tetradecen-1-ol formate, and (Z)-1,12-heptadecadiene. Both (Z)-9-tetradecen-1-ol formate and (Z)-1,12-heptadecadiene can substitute for (Z)-11-hexadecenal in trap disruption experiments and affect the sexual behavior of males, although neither has been identified in the volatiles released by calling females. All three compounds elicited responses from the same class of pheromone-sensitive receptor neurons over a range of stimulus concentrations. At equivalent stimulus concentrations, however, (Z)-11-hexadecenal elicited about a 10-fold greater response than (Z)-1,12-heptadecadiene. (Z)-9-Tetradecen-1-ol formate elicited a response slightly higher than, but not significantly different from, the response to (Z)-1,12-heptadecadiene.
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Mention of a commercial or proprietary product in this paper does not constitute an endorsement of that product by the U.S. Department of Agriculture or the State of Florida.
Postdoctoral fellow employed through a cooperative agreement between the Insect Attractants. Behavior and Basic Biology Research Laboratory; ARS; USDA; Gainesville, Florida 32604, and The Department of Entomology and Nematology, University of Florida, Gainesville. Florida 32611.
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Grant, A.J., Mayer, M.S. & Mankin, R.W. Responses from sensilla on antennae of maleHeliothis zea to its major pheromone component and two analogs. J Chem Ecol 15, 2625–2634 (1989). https://doi.org/10.1007/BF01014721
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DOI: https://doi.org/10.1007/BF01014721