In Lincoln Canterbury, the addition of the minor components in various combinations to the binary blend did not result in any significant increase in the number of males caught (Treatment, F3,16 = 0.23, P = 0.87) (Figure ). In contrast, in Little River, no males were caught in traps baited with the binary blend alone (Figure ). Males were only caught in a binary blend combined with either Z3Z6Z9-23Hy or 16:Ald, 16:Ac and 18:OH or all of the four minor components. The highest catch was obtained in traps baited with the binary blend combined with 16:Ald, 16:Ac, 18:OH and Z3Z6Z9-23Hy (Treatment, F1,8 = 6.6, P < 0.05) (Figure ).