CHEMICAL ECOLOGY Attractiveness and Specificity of Pheromone-baited Traps for Male Dogwood Borer, Synanthedon scitula Harris (Lepidoptera: Sesiidae)

Captures of male dogwood borer, Synanthedon scitula (Harris), in traps baited with trinary andbinaryblendsof the female sexpheromonecomponentswere comparedwith those in traps baitedwith themost effective commercially available lure in apple orchards inWestVirginia, Virginia, and North Carolina. Traps baited with the trinary blend [88:6:6 vol:vol:vol (Z,Z)-3,13 octadecadienyl acetate (ODDA):(E,Z)-2,13-ODDA:(Z,E)-3,13-ODDA] and the binary blend [96:4 (Z,Z)-3,13ODDA:(E,Z)-2,13-ODDA] captured signiÞcantly more male dogwood borers than traps baited with thebest commercial lure. Although the trinary blend captured themostmales, therewas no signiÞcant difference in captures with the binary blend at all six Þeld sites. Chemical analysis revealed that the commercial lure contained 91.5% (Z,Z)-3,13-ODDA, 7.3% (Z,E)-3,13-ODDA, and 1.2% (E,Z)-3,13ODDA, a potent behavioral antagonist of dogwood borer. Species speciÞcity of the trinary and binary blends was very high; 97% of all moths captured were dogwood borer compared with 6Ð74.4% for thecommercial lure.Maledogwoodborer showedaconcentration-dependent response to trapsbaited with different source concentrations of the trinary blend at all locations and of the binary blend at most locations. Between 4 and 113 times more male dogwood borers were captured in traps baited with the trinary blend within commercial orchards than within adjacent woodland habitats.