Article révisé par les pairs
Résumé : The poison gland of minor workers of P.pallidula.Nyl. contains 3-ethyl-2,5-dimethylpyrazine which induces trail-following in other workers, but does not account for the full trail-following effect of one worker's poison gland. No pyrazines were detected in major workers and their glands do not contain the pheromone.