Essential oils of citrus fruit stimulate oviposition in the Mediterranean fruit fly Ceratitis capitata (Diptera: Tephritidae)
Identifieur interne : 001501 ( Main/Exploration ); précédent : 001500; suivant : 001502Essential oils of citrus fruit stimulate oviposition in the Mediterranean fruit fly Ceratitis capitata (Diptera: Tephritidae)
Auteurs : Charalampos S. Ioannou [Grèce] ; Nikos T. Papadopoulos [Grèce] ; Nikos A. Kouloussis [Grèce] ; Chrysoula I. Tananaki [Grèce] ; Byron I. Katsoyannos [Grèce]Source :
- Physiological Entomology [ 0307-6962 ] ; 2012-12.
English descriptors
- KwdEn :
Abstract
Female Mediterranean fruit flies (medfly) Ceratitis capitata (Wiedemann) (Diptera: Tephritidae) perceive both qualitative and quantitative aspects of citrus fruit chemistry. However, the behavioural and biological adjustments of this response remain largely unknown. In the present study, the ovipositional responses of gravid female medflies to essential oils (i.e. the most critical resistance factor to medfly infestation) of various citrus fruits are investigated. In dual‐choice (treatment versus distilled water control) experiments, females lay significantly more eggs into pre‐punctured hollow oviposition hemispheres (domes) provided with 1 µL of citrus peel oil from sweet orange, satsuma mandarin, bitter orange, grapefruit and lemon compared with odourless domes. No‐choice tests show a weak effect of lemon essential oils in stimulating oviposition. The female ovipositional response to sweet orange oil (the most active in eliciting oviposition) is dose‐dependent. Additionally, limonene, the most abundant chemical in all citrus oils, stimulates oviposition, whereas linalool, a representative compound of immature citrus fruit associated with high toxicity against immature stages of fruit flies, has a significant deterrent effect. In further no‐choice tests, females lay approximately 23% fewer eggs in limonene (93%) (amount found in orange oil) and 60% fewer eggs in limonene 93% plus linalool 3% (approximately 10‐fold the amount found in orange oil) mixtures, relative to sweet orange oil. The results suggest that the limonene content accounts largely (but not completely) for the ovipositional responses observed in sweet orange oil, whereas high linalool proportions are capable of significantly masking and/or disrupting its stimulatory effects in citrus oils. The importance and practical implications of these findings with respect to understanding how citrus fruit chemistry influences the ovipositional responses of medfly is discussed.
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DOI: 10.1111/j.1365-3032.2012.00847.x
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However, the behavioural and biological adjustments of this response remain largely unknown. In the present study, the ovipositional responses of gravid female medflies to essential oils (i.e. the most critical resistance factor to medfly infestation) of various citrus fruits are investigated. In dual‐choice (treatment versus distilled water control) experiments, females lay significantly more eggs into pre‐punctured hollow oviposition hemispheres (domes) provided with 1 µL of citrus peel oil from sweet orange, satsuma mandarin, bitter orange, grapefruit and lemon compared with odourless domes. No‐choice tests show a weak effect of lemon essential oils in stimulating oviposition. The female ovipositional response to sweet orange oil (the most active in eliciting oviposition) is dose‐dependent. Additionally, limonene, the most abundant chemical in all citrus oils, stimulates oviposition, whereas linalool, a representative compound of immature citrus fruit associated with high toxicity against immature stages of fruit flies, has a significant deterrent effect. In further no‐choice tests, females lay approximately 23% fewer eggs in limonene (93%) (amount found in orange oil) and 60% fewer eggs in limonene 93% plus linalool 3% (approximately 10‐fold the amount found in orange oil) mixtures, relative to sweet orange oil. The results suggest that the limonene content accounts largely (but not completely) for the ovipositional responses observed in sweet orange oil, whereas high linalool proportions are capable of significantly masking and/or disrupting its stimulatory effects in citrus oils. The importance and practical implications of these findings with respect to understanding how citrus fruit chemistry influences the ovipositional responses of medfly is discussed.</div></front></TEI><affiliations><list><country><li>Grèce</li></country></list><tree><country name="Grèce"><noRegion><name sortKey="Ioannou, Charalampos S" sort="Ioannou, Charalampos S" uniqKey="Ioannou C" first="Charalampos S." last="Ioannou">Charalampos S. Ioannou</name></noRegion><name sortKey="Katsoyannos, Byron I" sort="Katsoyannos, Byron I" uniqKey="Katsoyannos B" first="Byron I." last="Katsoyannos">Byron I. Katsoyannos</name><name sortKey="Kouloussis, Nikos A" sort="Kouloussis, Nikos A" uniqKey="Kouloussis N" first="Nikos A." last="Kouloussis">Nikos A. Kouloussis</name><name sortKey="Papadopoulos, Nikos T" sort="Papadopoulos, Nikos T" uniqKey="Papadopoulos N" first="Nikos T." last="Papadopoulos">Nikos T. Papadopoulos</name><name sortKey="Tananaki, Chrysoula I" sort="Tananaki, Chrysoula I" uniqKey="Tananaki C" first="Chrysoula I." last="Tananaki">Chrysoula I. Tananaki</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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