Rôle de substances cuticulaires non volatiles d'Acrolepiopsis assectella (Lep.: Hyponomeutoidea) dans la reconnaissance de l'hôte par les parasitoïdesDiadromus pulchellus etD. collaris (Hym.: Ichneumonidae)

Gustatory sensilla sensitive to protein kairomones trigger host acceptance by an endoparasitoid

“…(a) Insects D. pulchellus and its host A. assectella were reared as previously described (Arnault 1982;Lecomte & Thibout 1984;Bénédet et al 1999). D. pulchellus females used in this study were mated at emergence, and then isolated in cylindrical vials for 5-7 days, where they were fed on 10% (w/v) sucrose in water according to Bekkaoui & Thibout (1992).…”

Substances soufrées desAlliumet insectes

“…Les acides amines precurseurs pourraient etre impliques dans ce resultat (Bekkaoui et Thibout, 1992 Un autre aspect interessant des relations Allium-insectes est que les phytophages vrais, comme Ia teigne du poireau, sont sensibles aux Ti tandis que ceux qui sont lies a des microorganismes, comme Ia mouche de l'oignon, sont plus sensibles aux composes de degradation, de meme que le parasitolde est lui aussi sensible aux composes de degradation des Ti.…”

Evaluation of a candidate classical biological control agent and critical assessment of suggested host specificity testing guidelines

“…Smaller containers were expected to enhance motivation to oviposition through an increase in the frequency of host encounters; however, proximity to hosts did not affect parasitism rates. Although contact with host cocoons normally elicits a strong oviposition response in D. pulchellus (Bekkaoui and Thibout, 1992), it is possible that desensitisation occurs after a period of time. Such loss of stimulus could result from exhaustion of egg or energy resources or from an increased frequency of encounters with previously parasitised hosts.…”

“…This highlights the importance of the host's cocoon in the recognition process (Bekkaoui and Thibout, 1993;Gauthier et ah, 2004) and suggests a significant degree of host specificity. Indeed, while naked leek moth pupae will be parasitised by D. pulchellus, they are less attractive than pupae kept inside the cocoon (Bekkaoui and Thibout, 1992). Despite being reared on attractive Brassica spp., three of the distantly related non-targets (Mamestra configurata, Spodoptera exigua and Pieris rapae) did not stimulate D. pulchellus.…”