Evidence of a sex pheromone released by sapodilla bud borer, Zamagiria dixolophella Dyar (Lepidoptera: Pyralidae), females was obtained under field conditions. Delta type traps baited with 2-d-old virgin females captured wild males in a sapodilla (Manilkara zapota (L.) van Royen) plantation. Once the existence of the sex pheromone was demonstrated, the following study was undertaken to describe calling behavior of Z. dixolophella under laboratory conditions. The calling position observed in this moth is similar to that reported for other species of this subfamily. A single period of calling was observed. The calling observed is of the continuous type and was observed only during scotophase. The females initiated calling when 1-d-old. The maximum number of insects calling was observed in 2-3-d-old females between the fourth and eighth h of scotophase. Calling in these females is controlled by a circadian rhythm. The results are discussed in view of the importance of later studies related to the identification of the sex pheromone.
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