Figure 4. Trial 4 in Trapping Sweetpotato Weevil, Cylas formicarius (Coleoptera: Brentidae), with High Doses of Sex Pheromone: Catch Enhancement and Weathering Rate in Hawaii

Figure 4. Trial 4 results: Effect of weathering over 40 weeks on trap catch. Decline in sweetpotato weevil catch/trap/week over 40 weeks in traps baited with (A) septum holding 1.0 mg male lure (see text for calculated exponential decay curve), and (B) septum holding 120 μg male lure (see text for calculated exponential decay curve). Calculated septum age where catch is 50% of fresh catch is presented for each curve.