In tests with isomeric mixtures, a 60:40 Z,E:E,E isomer ratio produced the highest mean catch of males. However, Z,E:E,E ratios of 90:10 to 30:70 also registered good catches, indicating that the active Z,E isomer of TDDA is synergized by adding (E,E)-TDDA. In trials of preservatives, traps baited with the attractant containing UOP-688/(Z,E)-TDDA at a 10:1 ratio caught significantly more carpenterworm moths than any other preservative/attractant combination. Sustane-6/(Z,E)-TDDA at a 20:1 ratio was 2nd best in capturing males and ratios from 10:1 to 100:1 also performed well in both degree of attractancy and longevity. Trioctanoin and olive oil performed poorly as preservatives.