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    Author(s): N.A. Andryszak; Thomas L. Payne; J.C. Dickens; John C. Moser; R.W. Fisher
    Date: 1990
    Source: J. Entomol. Sci. Vol. 25(4): 593-598
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (458 KB)


    Electroantennograms (EAGs) were recorded from major workers, queens, and males of the Texas leaf cutting, Atta texana (Buckley) (Hymenoptera: Formicidae) in response to serial dilutions of two alarm substances, 2-heptanone and 4-methyl-3-heptanone, and its trial phermone, 4-methylpyrrole-2-carbonxylate. The lower EAG threshold for major workers relative to queens and males for both alarm substances correlated well with previously reported behavioral bioassays which showed workers to be most responsive to these odorants. Although laboratory behavioral bioassays showed minor workers, queens, and males to have similiar behavilral thresholds from the trail pheromone, minor workers wrre more responsive to higher concentrations of the trail pheromone. However, EAGs revealed queens significantly more sensitive and responsive to the trail pheromone than the other castes. These seemingly enigmatic results are discussed with regard to A. texana biology and receptor physiology.

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    Andryszak, N.A.; Payne, Thomas L.; Dickens, J.C.; Moser, John C.; Fisher, R.W. 1990. Antennal olfactory responsiveness of the Texas leaf cutting ant (Hymenoptera: Formicidae) to trail pheromone and its two alarm substances. J. Entomol. Sci. Vol. 25(4): 593-598


    Leaf cutting ant, Atta texana, olfaction, trail pheromone, electroantennogram, EAG, trail pheromone, behavior

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