To trap the agave weevil, Scyphophorus acupunctatus Gyllenhal, tissue of Agave tequilana F.A.C. Weber var. ‘azul’ and the synthetic pheromone 2-methyl-4-octanone were used. This study evaluated the efficacy of the fermented “pineapple” or “head” of A. tequilana. We also identified volatile compounds attractive to the agave weevil. In the field, between August 2009 and December 2011, we evaluated the following treatments: 1) pheromone, 2) pheromone fermented agave head, 3) pheromone non-fermented agave head, 4) fermented agave head, 5) non-fermented agave head, and control (water insecticide). The volatiles were sampled using the technique of solid-phase microextraction and identified with a gas Chromatograph coupled to a mass selective detector. The traps baited with the pheromone and fermented agave head caught more weevils than did the other treatments. The fermented agave head increased the attraction of S. acupunctatus, while the non-fermented agave head did not contribute significantly. The following volatiles were identified in the fermented agave head: ethyl acetate, ethanol, 2-butanol, and acetic acid. In the non-fermented agave head, 24 volatile compounds were collected, and they were different than those identified in the fermented head. The results obtained indicated that the fermented material was a viable alternative to optimize trapping of S. acupunctatus, because the liberated volatile chemical compounds of the attractant captured a greater number of weevils in the field.
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Vol. 37 • No. 3