Etude électroantennographique de la réception de stimulus odorants d'origine végétale chez <i>Acrolepiopsis assectella</i>

Lecomte, Conrad; Pouzat, J.

doi:10.1111/j.1570-7458.1986.tb02150.x

Cited by 13 publications

(11 citation statements)

References 31 publications

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“…EAG recordings. The recording method used was quite conventionnal (Schneider, 1957;Pouzat, 1974;Lecomte & Pouzat, 1986), except for the following details.…”

Section: Methodsmentioning

confidence: 99%

Electroantennogram responses of Zabrotes subfasciatus to odours of the sexual partner

Pimbert

Pouzat

1988

Entomologia Exp Applicata

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Odours of female Zabrotes subfasciatus Boh, elicit strong electroantennogram (EAG) responses in their sexual partners. Virgin female insects used in experiments were of different ages and given seeds, or not, of the host plant, Phaseolus vulgaris L. The odours of females which did not get host plant seeds, do not elicit EAG responses in virgin males, until they are at least 6 days old. On the other hand, the release of the sex pheromone as perceived by the male antennae, occurs earlier in the life of females when they are in contact with the host plant's seeds. This suggests that the sexual attractiveness of the females of this specialist insect is probably closely correlated with vitellogenesis. The latter is indeed highly dependent on host plant stimulation. RÉSUMÉ Réponses électroantennographiques de Zabrotes subfasciatus aux odeurs du partenaire sexuel Des EAG sont enregistrés chez les mâles de Zabrotes subfasciatus en réponse à l'odeur du partenaire sexuel. Les insectes femelles, utilisés dans les expériences sont d'âges différents, vierges et mis en présence ou non de graines de la plante‐hôte, Phaseolus vulgaris. Les odeurs des femelles vierges mises en absence des graines n'évoquent pas de réponses électroantennographiques chez les mâles vierges—tout au moins tant qu'elles n'ont pas atteint un âge relativement avancé (6 jours environ). Par contre, le contact avec les graines de la plante‐hôte favorise une émission plus précoce de la phéro‐mone sexuelle perçue par les antennes des mâles. Ceci nous fait supposer que l'attractivité sexuelle des femelles est probablement corrélée à la vitellogenèse, elle‐même très dépendante de la stimulation par la plante‐hôte chez cet insecte spécialiste.

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“…EAG recordings. The recording method used was quite conventionnal (Schneider, 1957;Pouzat, 1974;Lecomte & Pouzat, 1986), except for the following details.…”

Section: Methodsmentioning

confidence: 99%

Electroantennogram responses of Zabrotes subfasciatus to odours of the sexual partner

Pimbert

Pouzat

1988

Entomologia Exp Applicata

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“…Volatile isothiocyanates are attractive for Plutella xylostella but have a repellent effect at higher concentrations (Pivnick et al ., 1994). For leek moths to be able to locate the host plant properly, the concentration of sulphur compounds must reach a certain threshold (Lecomte & Pouzat, 1986). This could be one of the reasons to explain the positive behavioural response after the induced response in leek.…”

Section: Discussionmentioning

confidence: 99%

Consequences for a specialist insect and its parasitoid of the response of Allium porrum to conspecific herbivore attack

Dugravot

Thibout

2006

Physiological Entomology

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Abstract. Recent studies on the leek Allium porrum L. demonstrate that a sharp increase in the release of volatile and nonvolatile sulphur compounds occurs in response to attack by the specialist phytophage, the leek moth Acrolepiopsis assectella (Zeller). The consequences of that response on the developmental capacity and behaviour of the leek moth and on the host‐searching behaviour of the parasitoid hymenoptera Diadromus pulchellus Wesmael have been studied. No immediate adverse effect on larval development is seen, but the duration of male development is significantly longer. In addition, an almost 20% decrease is observed in the number of oocytes produced by adult females that developed on attack‐damaged leek plants. Leek moths do not avoid damaged plants systematically. On attacked plants, larvae tend to consume more and females to lay more eggs, although the latter tendency disappears after intensive attack. Concerning host‐searching by D. pulchellus, the data indicate that females make use of the induced leek response. Parasitoids are attracted more strongly to attacked plants than to undamaged plants and mechanically damaged plants. The results of this study in a tritrophic system involving a biannual plant suggest a complex defence system combining direct and indirect mechanisms. Sulphur compounds may act by reducing second‐generation pests, thereby preventing the specialist insect population from exploding at the expense of the leek.

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“…Previous studies (Lecomte & Thibout, 1981;Lecomte & Pouzat, 1986) had shown the following odours to be biologically active: natural odour of leek and several volatiles identified in this odour. Previous studies (Lecomte & Thibout, 1981;Lecomte & Pouzat, 1986) had shown the following odours to be biologically active: natural odour of leek and several volatiles identified in this odour.…”

Section: Methodsmentioning

confidence: 96%

“…The olfactory responsiveness of adult moths was assessed by electroantennography (EAG tests) as described by Lecomte & Pouzat (1986). The olfactory responsiveness of adult moths was assessed by electroantennography (EAG tests) as described by Lecomte & Pouzat (1986).…”

Section: Methodsmentioning

confidence: 99%

Behavioural and olfactory variations in the leek moth, Acrolepiopsis assectella, after several generations of rearing under diverse conditions

Lecomte¹,

Pierre²,

Pouzat³

et al. 1998

Entomologia Exp Applicata

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Three strains of the leek moth, Acrolepiopsis assectella, were compared: two reared on leek leaves (Allium porrum) for which generations 10 to 12 (L) or generation 2 (G2) were used, the third one (D) reared on an artificial diet incorporating leek powder, for which generation ca 140 was examined. The walking behaviour (L and D) and the antennal responsiveness (L, G2 and D) were compared between individuals subjected to leek leaf odour and 4 volatiles identified in these leaves: 2 specific sulphur ones (dipropyl thiosulphinate and dipropyl disulphide) and 2 'general green leaf volatiles' (cis-3-hexen-1-ol and trans-2-hexen-1-ol). The walking behavioural thresholds to leek odour, dipropyl thiosulphinate, and cis-3-hexen-1-ol were lower for L than for D females. The chemoanemotactic responses to dipropyl disulphide are almost identical, and trans-2-hexen-1-ol has nearly no activity. Accordingly, the olfactory sensitivity (assessed by EAG) to sulphur volatiles and cis-3-hexen-1-ol was higher for L and G2 females than for D ones. The threshold for thiosulphinate was at a concentration (v/v) of 4 10 ,4 M/l for D females, 4 10 ,5 M/l for L females and 4 10 ,8 M/l for G2 ones. It may be hypothesised that laboratory rearing conditions cause variations in the thresholds of antennal sensitivity and walking behaviour to specific and more efficient leek volatiles. This may result from the selective pressures experienced by the larvae reared in the laboratory.

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Etude électroantennographique de la réception de stimulus odorants d'origine végétale chez Acrolepiopsis assectella

Cited by 13 publications

References 31 publications

Electroantennogram responses of Zabrotes subfasciatus to odours of the sexual partner

Electroantennogram responses of Zabrotes subfasciatus to odours of the sexual partner

Consequences for a specialist insect and its parasitoid of the response of Allium porrum to conspecific herbivore attack

Behavioural and olfactory variations in the leek moth, Acrolepiopsis assectella, after several generations of rearing under diverse conditions

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