Synanthedon rileyana (H. Edwards) response to selected clearwing pheromoneblends

Male moths of the horse nettle borer, Synanthedon rileyana (H. Edwards), we re attracted to various blends of (E,Z)-3,13-ODDOH alcohol and (E,Z)-3,13-O DDA acetate. Fields containing horse nettle, Solanum carolinense L., were u tilized in Ohio and Arkansas during these attractancy trials in 1988 and 19 89. 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 c onfirming earlier observations and expanding the knowledge through replicat ed 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 t rapped, begins in Ohio in mid-July and peaks by mid-August.