Abstract
We studied the distribution of wild Mediterranean fruit flies, Ceratitis capitata (Diptera: Tephritidae) in different environments of trimedlure-baited Jackson traps during high fall season populations in Southern Egypt. We found that 98% of females attracted to within aim radius of standard trimedlure (TML)-baited Jackson traps remained on the surrounding foliage without approaching the trap. Also about 30 % of males aggregated there, calling and competing for matings with approaching females. The closest mating occurred 25 cm from a standard trap. The nearest lek formation away from a trap was observed at a distance of 2 m on the same trap tree. The highest captures of males were recorded in the morning after male calling on the foliage reached its daily peak. Jackson traps baited with both protein hydrolyzate and TML on cotton wicks caught as many males, but significantly more females than traps with TML only.
Résumé
On a étudié la distribution de la cératite sauvage Ceratitis capitata (Diptera: Tephritidae) en Egypte méridionale, en automne lorsque la population des cératites a été nombreuse. L’expérience a crée plusieurs environnements de pièges “Jackson” garnis de trimedlure (TML). On a trouvé que 98% des femelles attirées dans un rayon de 1 mètre des pièges conventionnels à TML sont restées dans le feuillage avoisinant sans s’approcher du piège. Approximativement 30% des mâles s’y sont réunis aussi, faisant appel aux femelles à l’aide de phéromones et se faisant concurrence pour s’accoupler avec les femelles qui se rapprochaient. L’accouplement le plus proche d’un piège conventionnel a eu lieu à 25 cm. Le lek le plus proche, mais à l’extérieur, d’un piège s’est constitué à 2 mètres de distance, sur le même arbre. Les plus grandes captures de mâles ont été enregistrées le matin après le maximum d’appels par les mâles. Des pièges “Jackson” garnis d’hydrolysate de protéine et d’un mèche de coton trempé dans du TML ont attrapé autant de mâles, mais plus de femelles, que des pièges garnis uniquement de TML.
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Hendrichs, J., Reyes, J. & Aluja, M. Behaviour of Female and Male Mediterranean Fruit Flies, Ceratitis Capitata in and Around Jackson Traps Placed on Fruiting Host Trees. Int J Trop Insect Sci 10, 285–294 (1989). https://doi.org/10.1017/S1742758400003519
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DOI: https://doi.org/10.1017/S1742758400003519