Decreased Attraction of Anastrepha ludens to Combinations of Two Types of Synthetic Lures in a Citrus Orchard

Abstract

Listen

Translate article

Combinations of the previously developed attractants CEHO from host fruit aroma and AMPu from volatile metabolites of amino acids were evaluated for attractiveness to gamma-irradiated Mexican fruit flies, Anastrepha ludens, in a citrus orchard. In one experiment, McPhail traps with polyvinyl chloride (PVC) lures loaded with CEHO (10:1:1:50 mixture of 1,8-cineole, ethyl hexanoate, hexanol, and ethyl octanoate) were more attractive than blank traps. McPhail traps with AMPu (10:10:1 mixture of ammonium bicarbonate, methylamine HCl, and putrescine) were more attractive than blank and CEHO traps. Traps containing both AMPu and CEHO lures were less attractive than traps containing AMPu alone. In another experiment, sticky yellow panels and spheres were used to compare attractiveness of the same two attractants in different formulations. Sticky traps baited with membrane formulations of CEHO (10:1:1:10 mixture of the chemicals listed above) were not significantly attractive. Sticky traps with polypropylene tubes containing an agar formulation of AMPu (6:10:1 mixture of ammonium carbonate, methylamine HCl, and putrescine) were more attractive than blank and CEHO baited traps. As in the first experiment, traps with both AMPu and CEHO lures were less attractive than traps with AMPu alone. Results indicate that attractive host-odor volatiles and attractive amino-acid metabolites interact negatively with regard to attractiveness to the Mexican fruit fly.