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Discrimination by male dogwood borer, Synanthedon scitula (Lepidoptera: Sesiidae), among traps baited with commercially available pheromone lures.

The response of male dogwood borer, Synanthedon scitula (Harris) (Lepidoptera: Sesiidae), to four commercially available pheromone lures and to pheromone source concentration was evaluated in field trapping studies in commercial apple orchards in Virginia and West Virginia Male peachtree borer, Synanthedon exitiosa (Say), lesser peachtree borer, Synanthedon pictipes (Grote & Robinson), and lilac borer, Podosesia syringae (Harris), were also captured in traps baited with all lures tested. Among the lures used, the Scenturion dogwood borer lure was the most attractive to and selective for dogwood borer. Male dogwood borer showed a concentration-dependent response to traps baited with different source concentrations of the pheromone from Scenturion. Chemical analyses revealed that all lures contained principally (Z,Z)-3,13-octadecadien-1-ol acetate (ODDA) but that a significantly higher percentage of (Z,E) plus (E,Z)-3,13-ODDA was present in the Scenturion lure, compared with the others. Weekly collections of fresh male and female dogwood borer pupal exuviae from April until October in 2002 and 2003 suggested that traps baited with Scenturion lures significantly underestimated the size of populations in commercial apple orchards.