Behavioral Responses of Male Eoreuma loftini (Lepidoptera: Pyralidae) to Ovipositor Extracts1

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Eoreuma loftini (Dyar) adults were observed in the laboratory to study their behavior before and during the mating process. Characteristic female calling behavior and male response to females and crude sex pheromone extracts made from excised ovipositors were noted. Bioassays were performed on ovipositor extracts, and levels of male activity at various hours after darkness were determined. Males began responding to extracts of ovipositors at darkness, and activity peaked between 5 and 9 h after darkness. Males exposed to 0.5-1.0 female equivalents of extract exhibited responses indistinguishable from those to calling females. In the presence of pheromone extracts, males often attempted to mate with other males, the nylon mesh covering, and the filter-paper square used to dispense the pheromone.

Document Type: Research Article

Publication date: February 1, 1988

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