Figure 3. Trial 3 in Trapping Sweetpotato Weevil, Cylas formicarius (Coleoptera: Brentidae), with High Doses of Sex Pheromone: Catch Enhancement and Weathering Rate in Hawaii

Figure 3. Trial 3 results: Effect of weathering for 0, 8, and 16 weeks on trap catch. Average catch/trap/day of sweetpotato weevils in traps baited with sweetpotato weevil male lure of three different loadings (12 μg, 120 μg, and 1.0 mg) weathered for 0, 8, or 16 weeks. Sweetpotato weevil catch in traps baited with 1.0 mg sweetpotato weevil male lure was significantly greater than catch in traps baited with either 120 μg or 12 μg lure, and there was no significant difference in catch between traps baited with 120 μg versus 12 μg lure. Numbers presented at the tops of the columns are the number of times greater the catch is than in traps baited with lower lure dosages. Error bars are not presented in the figure because high variations in catch within each treatment led to large error bars which would adversely affect the viewing of the data. Mean and error (SEM) data, for the 1.0 mg, 120 μg, and 12 μg treatments, respectively, are as follows: Week 0 (40.31 ± 28.70, 1.86 ± 0.76, 1.43 ± 1.11); Week 8 (23.66 ± 8.32, 14.43 ± 2.34, 1.37 ± 0.85); Week 16 (16.31 ± 4.74, 6.43 ± 2.71, 0.71 ± 0.51).