Behavioural responses of female Mediterranean fruit fly, Ceratitis capitata(Wiedemann) (Diptera: Tephritidae), to fruit volatiles stimuli


Abstract: The behavioural response of mature Ceratitis capitata females to fruit volatiles wasinvestigated by using a still-air olfactometer. Two choice bioassays were performed by employingthree different fruits as odour source: apple, pear and grapefruit. Results indicated that, in theabsence of visual cues, olfactory fruit stimuli are important in the process of host-findingbehaviour of females at small distance. Females (a) are selectively attracted to volatiles derivingfrom different host fruits, (b) the attractiveness depends on the time elapsed since the source wasplaced inside the olfactometer and (c) the ripening of fruit can influence the behavioural response.

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