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Different lures were also compared for light green or purple prism traps hung at least 10 m above ground in the canopy of ash trees. Traps were baited with cis-3- hexenol, an 80:20 blend of Manuka and Phoebe oils, or both. There were 17 replicates at three sites with EAB populations that ranged from low/moderate to high. For all sites and both trap colors combined, traps baited with cis-3-hexenol or both lures captured more EAB than unbaited traps, while traps baited with the 80:20 blend were intermediate. Males were significantly more attracted to traps with lures that contained cis-3-hexenol than to the 80:20 blend alone or unbaited traps. The number of females captured did not diff er significantly between treatments. For both sexes combined, more EAB were captured on purple than on light green traps. Females were significantly more attracted to purple traps but there was no difference in number of males captured between light green and purple traps. The differences in male and female responses to the different treatments and colors were most pronounced at the site with low EAB populations. In a similar study, light green prism traps baited with cis-3-hexenol or the 80:20 blend of Manuka and Phoebe oils were compared to purple prism traps baited with the 80:20 blend. All traps were hung at least 6 m above ground in the canopies of ash trees. There were 160 replicates at sites with low EAB densities in Indiana, Kentucky, Maryland, Michigan, Minnesota, Missouri, New York, Ohio, Pennsylvania, West Virginia, and Wisconsin. More males were captured in light green traps baited with cis-3-hexenol than in purple traps baited with the 80:20 blend, while light green traps baited with the 80:20 blend were intermediate. There were no differences in female trap catches between treatments, but they tended to prefer purple traps baited with the 80:20 blend. Detection rates were similar for all three treatments; 52 percent of light green traps baited with cis-3-hexenol, 59 percent of light green traps baited with the 80:20 blend, and 57 percent of purple traps baited with the 80:20 blend captured at least one EAB. Overall, at sites with low EAB densities, double-decker traps appear to be more attractive than prism traps hung 3-5 m above ground in the canopy. Studies using only prism traps hung at least 6 m above ground in the canopy showed males tended to prefer light green traps baited with cis-3-hexenol, while females tended to prefer purple traps baited with an 80:20 blend of Manuka and Phoebe oils. A combination of trap designs and lures may improve the likelihood of attracting both sexes, which could increase the potential for capturing at least one beetle. Literature Cited Crook, D.; Khrimian, A.; Francese, J.A.; Fraser, I.; Poland, T.M.; Sawyer, A.J.; Mastro, V.C. 2008. Development of a host-based semiochemical lure for trapping emerald ash borer, Agrilus planipennis (Coleoptera: Buprestidae). Environmental Entomology. 37: 356-365. Crook, D.J.; Francese, J.A.; Zylstra, K.E.; Fraser, I.; Sawyer, A.J.; Bartels, D.W.; Lance, D.R.; Mastro, V. 2009. Laboratory and field response of the emerald ash borer (Coleoptera: Buprestidae) to selected regions of the electromagnetic spectrum. Journal of Economic Entomology. 102: 2160-2169. Francese, J.A.; Mastro, V.C.; Oliver, J.B.; Lance, D.R.; Youssef, N.; Lavallee, S.G. 2005. Evaluation of colors for trapping Agrilus planipennis (Coleoptera: Buprestidae). Journal of Entomological Science. 40: 93-95. Francese, J.A.; Oliver, J.B.; Fraser, I.; Lance, D.R.; Youssef, N.; Sawyer, A.J.; Mastro, V.C. 2008. Infl uence of trap placement and design on capture of the emerald ash borer (Coleoptera: Buprestidae). Journal of Economic Entomology. 101: 1831-183. Lelito, J.P.; Fraser, I.; Mastro,V.C.; Tumlinson, J.H.; Baker, T.C. 2008. Novel visual-cue-based sticky traps for monitoring of emerald ash borers, AGrilus planipennis (Col., Buprestidae). Journal of Applied Entomology. 132: 668-67.> Marshall, J.M.; Storer, A.J.; Fraser, I.; Beachy, J.A.; Mastro, V.C. 2009. Eff ectiveness of differing trap types for the detection of emerald ash borer (Coleoptera: Buprestidae). Environmental Entomology. 38: 1226-1234> Marshall, J.M.; Storer, A.J.; Fraser, I.; Mastro, V.C. 2010. Effi cacy of trap and lure types for detection of Agrilus planipennis (Col., Buprestidae) at low density. Journal of Applied Entomology. 134: 296- 302. Poland, T.M.; McCullough, D.G. 2006. Emerald ash borer: invasion of the urban forest and the threat to North America�s ash resource. Journal of Forestry. 104: 118-124."

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