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CONTROLLING DACUS OLEAE 1 BY FLUORESCENT YELLOW TRAPS

When three fluorescent yellow 15times 20 cm plates covered by Bird Tanglefoot® were vertically suspended in the canopy of each tree in a 21‐tree semi‐isolated olive grove near Athens, 9000 olive fruit flies were trapped from July‐November. An additional 3300 flies were trapped by twelve fluorescent yellow traps placed in three barrier olive trees. At crop harvest, the olive fruit infestation was 5%, 15%, and 50% in a bait‐sprayed, the fluorescent‐yellow trap, and an untreated grove, respectively. The olive fruit fly adult population, as measured by McPhail protein‐traps, was much larger in the untreated than in the yellow‐trap grove. The results indicated that males may be more attracted to the yellow traps than females. They also showed increased trapping rates in trees of high crop production as well as in the west side of the tree.