Traps baited with binary blends of (Z,Z)-3,13-octadecadien-1-ol acetate and the (E,Z)-isomer in ratios from 98:2 to 92:8 captured more male peachtree borer moths than did traps baited with other blends of these isomers. When the (E,Z)-isomer constituted more than 10% of the blend, trap capture was reduced significantly. Traps baited with binary blends of (Z,Z)-isomer and a minor amount of either (Z,E)- or (E,E)-isomer failed to catch males. When (Z,E)-isomer was added to (Z,Z)- and (E,Z)- isomers in trap baits, traps were most attractive when the ratio of the latter 2 isomers was 98:2, 96:4, and 94:6.