Antennal structure and oviposition behavior of the Plutella xylostella specialist parasitoid: Cotesia plutellae

Roux Olivier, Van Baaren John, Gers Charles, Arvanitakis Laurence, Legal Luc. 2005. Antennal structure and oviposition behavior of the Plutella xylostella specialist parasitoid: Cotesia plutellae. Microscopy Research and Technique, 68 : 36-44.

Résumé : Although several species of the genus Cotesia are used in biological control pro-grams against insect caterpillars throughout the world, little is known of their oviposition behavior. We describe here the types and distribution of antennal sensilla in Cotesia plutellae, a larval parasitoid of Plutella xylostella, and we analyze its oviposition behavior. Seven types of sensilla were found on both males and females. Only sensilla trichodea type II, with a putative contact chemoreceptive function, was significantly more abundant in females than in males, and its morphology and position on antennomeres were linked to the antennation behavior used by females during host search. We conclude that gustatory stimulus following antennal contact is probably the key stimulus inducing oviposition behavior. The sensilla type assumed to be implied in oviposition behavior was present in C. plutellae but not in two closely related species (C. glomerata and C. rubecula), which is discussed.

Mots-clés Agrovoc : Plutella xylostella, Cotesia plutellae, parasitoïde, insecte nuisible, culture maraîchère, ponte, microscopie, hôte, Braconidae, conformation animale

Classification Agris : H10 - Ravageurs des plantes

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Roux Olivier, Université Toulouse III Paul Sabatier (FRA)
• Van Baaren John, Université de Rennes I (FRA)
• Gers Charles, Université Toulouse III Paul Sabatier (FRA)
• Arvanitakis Laurence, CIRAD-FLHOR-UPR Horticulture (FRA)
• Legal Luc, Université Toulouse III Paul Sabatier (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/529062/)

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