Pheromonal Mediation of Alarm in the Eastern Yellowjacket (Hymenoptera: Vespidae)
AbstractEastern yellowjacket, Vespula maculifrons (Buysson), workers exhibited alarm responses to a target sphere treated with an extract of conspecific workers or an extract of the wasp sting apparatus. Workers of Vespula squamosa also responded to extracts of the sting apparatus of Vespula maculifrons, indicating some cross reactivity of their alarm pheromones. N-3-methylbutylacetamide, a known alarm pheromone of the southern yellowjacket, Vespula squamosa (Drury), was found in the extract of the eastern yellowjacket venom sac and also elicited alarm in worker V. maculifrons, although only when presented at an unnaturally high dose.
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