Experiments in Costa Rica and Honduras determined that both Metamasius hemipterus L. and Rhynchophorus palmarum L. could be captured in the same trap using pheromone lures emitting a mixture of their male-produced aggregation pheromones. Mass trapping of both species was conductedin commercial palmito palm (Bactris gasipaes, Kunth) over 16 months using a combination lure and insecticide-laden sugarcane at a density of 4 traps/ha. Capture rates of M. hemipterus were initially high and declined significantly while capture rates of R. palmarum were initially low andremained relatively constant. Pupae found in and damage to palmito declined significantly in plots with traps compared to pre-trapping levels and to control plots without traps. Yields of palmito palm increased in all plots but increased most in plots with traps.
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