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Olfactory response of male and female Scyphophorus acupunctatus Gyllenhal (Coleoptera: Curculionidae) to volatiles released from the same or opposite conspeciÞcs alone, or combined with host plant volatiles, was evaluated in the laboratory and Þeld. We also evaluated the response to synthetic Rhynchophorinae pheromones in the laboratory. In laboratory tests, attraction of males and females in Y-tube olfactometer to conspeciÞc males was greater than to females and clean air. Males and females preferred the combination males agave over agave alone. Both sexes were signiÞcantly attracted to 2-methyl-4-heptanol and 2-methyl-4-octanol compared with hexane control. In Þeld trials, weevils were successfully caught in the traps baited with conspeciÞcs and plant material. These Þeld results support those of the laboratory bioassays, showing that males attracted conspeciÞc males and females and addition of plant material enhanced the attraction. These results further suggest that S. acupunctatus produces an aggregation pheromone. Inglés

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