Abstract
Chemical analyses and field bioassays were conducted to identify major components of the sex pheromone of the southwestern pine tip moth, Rhyacionia neomexicana (Dyar). E-9-dodecenyl acetate was the most abundant pheromone component in gland washes, with 0.5–1.5 ng per female equivalent. Z-9-dodecenyl acetate, and E and Z-9-dodecenol were also present. A ratio of about 80:20 E:Z-9-dodecenyl acetate was the most attractive bait in field trapping. No males were caught in traps baited with a blend of E and Z-9-dodecenol, and addition of these alcohols at about a 3: 1 acetate/alcohol ratio did not improve attractiveness to E and Z-9-dodecenyl acetate baits. The role of pheromones in mating isolation of Rhyacionia species is discussed.
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