Relative Effectiveness of Jackson and McPhail Traps: A Year-Long Comparison in Coffee in Guatemala
Because the attractants for Mediterranean fruit flies (Ceratitis capitata) used in Jackson traps (trimedlure) and McPhail traps (NuLure) are based on different principles (male sex pheromone vs. nutrient, respectively), the effectiveness of the traps for different sexes at different times of the year and population densities has received much discussion. Current wisdom would suggest that, in general, Jackson traps baited with trimedlure plugs are more effective at detecting medfly populations than are McPhail traps. It is thought that the sexual nature of trimedlure attraction makes it a stronger lure than more general food-based attractants. Relative to the seasonal effectiveness of the two traps, it is usually argued that the liquid protein bait in McPhail traps would be more effective during the hotter, dryer as opposed to cooler, wetter months of the year and that the attractiveness of trimedlure to courting males would remain fairly constant. The research presented here was intended to address these questions and thereby aid in interpreting the significance of trap catches and improve trapping efforts in action programs.
KeywordsRelative Effectiveness Trap Catch Trap Type Sexual Nature Absolute Population Size
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