Synanthedon rileyana (H. Edwards) Response to Selected Clearwing Pheromone Blends

Male moths of the horse nettle borer, Synanthedon rileyana (H. Edwards), were attracted to various blends of (E,Z)-3,13-ODDOH alcohol and (E,Z)-3,13-ODDA acetate. Fields containing horse nettle, Solanum carolinense L., were utilized in Ohio and Arkansas during these attractancy trials in 1988 and 1989. Efficacy was determined by the number of males trapped in sticky traps. The optimum ratio of alcohol to acetate was found to be 100:25 to 100:50 confirming earlier observations and expanding the knowledge through replicated experiments in two states. A second blend of 100:3 (E,Z)-3,13-ODDOH and (E,Z)-2,13-ODDA also attracted more males than the blank traps did at both locations. Seasonal moth emergence, reflected by the number of male moths trapped, begins in Ohio in mid-July and peaks by mid-August.