Responses of Male Redbacked Cutworm, Euxoa ochrogaster (Lepidoptera: Noctuidae), to Sex Pheromone Components in a Flight Tunnell1

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Abstract
The four components of the sex pheromone of E. ochrogaster were tested in a flight tunnel, individually and in various combinations. Individually, only Z5-12:Ac and Z7–12:Ac stimulated activation responses, but neither initiated upwind flight. Of all possible binary combinations, only Z5-12:Ac + Z7–12:Ac elicited responses from activation to landing. Z5-10:Ac increased activation, upwind flight responses, and prolonged flight, but only when it was added to blends containing both Z5-12:Ac and Z7–12:Ac. Addition of Z9–12:Ac as a fourth component increased initiation of landing response on the source.