Obonyo M., Schulthess F., Chimtawi M., Mascarel G., Ahuya P. O., Le Rü Bruno, van den Berg J., Silvain Jean-François, Calatayud Paul-André. (2011). Sensilla on antennae, ovipositor and tarsi of the larval parasitoids, Cotesia sesamiae (Cameron 1906) and Cotesia flavipes Cameron 1891 (Hymenoptera: Braconidae): a comparative scanning electron microscopy study. Annales de la Société Entomologique de France, 47 (1-2), 119-127. ISSN 0037-9271.
Titre du document
Sensilla on antennae, ovipositor and tarsi of the larval parasitoids, Cotesia sesamiae (Cameron 1906) and Cotesia flavipes Cameron 1891 (Hymenoptera: Braconidae): a comparative scanning electron microscopy study
Année de publication
2011
Auteurs
Obonyo M., Schulthess F., Chimtawi M., Mascarel G., Ahuya P. O., Le Rü Bruno, van den Berg J., Silvain Jean-François, Calatayud Paul-André
Source
Annales de la Société Entomologique de France, 2011,
47 (1-2), 119-127 ISSN 0037-9271
Two braconid parasitoids of cereal stemborers in eastern Africa, Cotesia sesamiae and Cotesia flavipes, have been shown to display a similar hierarchy of behavioural events during host recognition and acceptance. In order to understand the mechanisms underlying host recognition and acceptance, the morphology of antennal sensilla on the last antennomeres, on the ovipositor, and on the fifth tarsomere and pretarsus of the prothoracic legs tarsi were studied using scanning electron microscopy followed by selective silver nitrate staining. It appeared that female C. sesamiae and C. flavipes shared the same types and distribution of sensory receptors, which enable them to detect volatiles and contact chemical stimuli from their hosts. In both parasitoids, four types of sensilla were identified on the three terminal antennomeres: (i) non-porous sensilla trichodea likely to be involved in mechanoreception, (ii) uniporous sensilla chaetica with porous tips that have gustatory functions, (iii) multiporous sensilla placodea, which are likely to have olfactory function, and (iv) sensilla coeloconica known to have thermo-hygroreceptive function. The tarsi of both parasitoids possessed a few uniporous sensilla chaetica with porous tips, which may have gustatory functions. The distal end of the ovipositor bore numerous dome-shaped sensilla. However, there were no sensilla coeloconica or styloconica, known to have gustatory function in other parasitoid species, on the ovipositors of the two braconid wasps.
Plan de classement
Sciences du monde animal [080]
Localisation
Fonds IRD [F B010087353]
Identifiant IRD
fdi:010087353
