The efficacy of two commercially available traps used for monitoring Bactrocera oleae (Rossi) (olive fruit fly) were tested in the Western Cape Province, South Africa. We compared the efficacy of yellow Delta traps and yellow Bucket traps, baited with Olive Fruit Fly lure, which attracts both B. oleae males and females. Traps were tested in 20 commercial olive groves, at three locations during autumn (March–May) in 2013. The yellow Delta traps caught significantly more B. oleae than the yellow Bucket traps, as well as significantly more B. oleae males than females. Ceratitis capitata (Wiedemann) and Bactrocera biguttula (Bezzi) were also trapped during the study. For both species, yellow Delta traps caught significantly more individuals than yellow Bucket traps. This study showed that yellow Delta traps performed better than yellow Bucket traps, in monitoring B. oleae activity in commercial olive groves during autumn, prior to harvest