The sex pheromone of female dogwood borers Synanthedon scitula (Harris) (Lepidoptera: Sesiidae) was determined to be an 88 : 6 : 6 ternary blend of (Z,Z)-3,13-ODDA, (E,Z)-2,13-ODDA, and (Z,E)-3,13-ODDA by GC-EAD and GC-MS. The major sex pheromone component, Z,Z-3,13-ODDA, was attractive as a single component. A blend of Z,Z-3,13-ODDA with 1~3% of E,Z-2,13-ODDA (binary blend) was more attractive than the single component. A third component, Z,E-3,13-ODDA, was sometimes observed in GC-EAD analyses, and enhanced attraction to the binary blend under most conditions. Synthetic lure showed high species-specificity. About 92% of all moths captured with the single component, Z,Z-3,13-ODDA, and 2-component blend (Z,Z-3,13-ODDA : Z,E-3,13-ODDA=94 : 6 ) were DWB males. Even greater levels of specificity were observed with the binary and ternary blends, with which over 97% of moths caught were DWB males, compared with the commercial lure from Scenturion ranged from 33-86% of all Sesiidae captured. Lures containing 1 mg of binary and ternary blends attracted 18 and 28 times more male DWB moths, respectively, than caged virgin females in field trials. Attraction to the ternary lures was strongly antagonized by addition of as little as 0.5% of a geometric isomer, E,Z-3,13-ODDA. In a period of 12 wk in 2004, more than 60,000 males were captured in Pherocon 1C and Delta traps baited with synthetic pheromone blends in six apple orchards in Virginia, West Virginia, and North Carolina. Lure longevity trials showed that ~76% of the pheromone remained in rubber septum lures after 12 weeks in the field.