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1 April 2011 Trap Response of Dargida terrapictalis (Buckett) (Lepidoptera: Noctuidae) to a Sex Attractant in Wheat-Growing Areas of Eastern Washington and Neighboring Oregon
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Abstract

Traps in eastern Washington and northeast Oregon wheat fields, baited with a sex attractant for the moth of the wheat head armyworm Dargida diffusa (Walker), captured the congener moth Dargida terrapictalis (Buckett). When the two components of a sex attractant for the wheat head armyworm were tested singly versus together in a trap, nearly all D. terrapictalis captured were in traps baited with the combination of (Z)-11-hexadecenyl acetate and (Z)-11-hexadecenal, indicating synergy of the two compounds as attractants. Traps baited with this sex attractant and maintained through the growing season captured D. terrapictalis primarily in May in Umatilla County, Oregon, and in June and early July in eastern Washington. Small numbers of D. diffusa were present also in these traps, largely coincident in time with D. terrapictalis captured. This is the first demonstration of a sex attractant for D. terrapictalis and confirms the presence of D. diffusa in the states of Oregon and Washington through the identification of trapped moths.

Peter J. Landolt, Diana Roberts, Mary Corp, and Silvia I. Rondon "Trap Response of Dargida terrapictalis (Buckett) (Lepidoptera: Noctuidae) to a Sex Attractant in Wheat-Growing Areas of Eastern Washington and Neighboring Oregon," Journal of the Kansas Entomological Society 84(2), 139-147, (1 April 2011). https://doi.org/10.2317/JKES101029.1
Accepted: 1 May 2011; Published: 1 April 2011
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