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Mise en evidence de la pheromone sexuelle chez les femelles de Blattella germanica L.

Published online by Cambridge University Press:  19 September 2011

P. G. Tokro
Affiliation:
Université de Bourgogne, Faculté des Sciences, Laboratoire de Zoologie, 6 Boulevard Gabriel, 21000 Dijon, France
R. Brossut
Affiliation:
Université de Bourgogne, Faculté des Sciences, Laboratoire de Zoologie, 6 Boulevard Gabriel, 21000 Dijon, France
L. Sreng
Affiliation:
Université de Bourgogne, Faculté des Sciences, Laboratoire de Zoologie, 6 Boulevard Gabriel, 21000 Dijon, France
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Abstract

A volatile female sex pheromone, secreted by the pygidial glands of Blattlla germaniea, which attracts males from a distance was studied. Ultrastructural studies showed common epidermal and canal cells associated with glandular cells, classified as class 3 secretory unit The thickness of pygidial glands from young virgin females Increased progressively and became larger, 10 to 13 days after adult emergence. It decreased markedly after mating and increased again after the release of the ootheca. Based on the morphology of the glands, it was further observed that B. germaniea young virgin females' attractiveness increased gradually, such attractiveness decreased at mating. After larval emergence, females' attractiveness wasonce more enhanced. Dkhktromethane extracts of pygidial glands attracted males from a distance. These results demonstrate the pheromone gradual secretion and similarly pygidial glands evolution during adult emergence.

Résumé

L'existence d'une phéromone sexuelle femelle attractive à distance et produite par ies glandes pygidiales cbez B. germaniea a été démontrée. L'ultrastructure de l'épithélium glandulaire a montré des cellules épidermiques banales et des cellules du canal assodées À des cellules sécrétrices, formant les unités glandulaires de classe 3. Chez la jeune femelle vlerge, la couche glandulaire est de faible épaisseur, elk augmente progressivement et atteint son maximun entre les 10 eme et 13ème jours. Pendant la gestation, elle diminue considérablement pub reprend sa croissance après le rejet de l'oothèque. L'attraction des femelles de B. germaniea est progressive, elle devient faible pendant la gestation puis les femelles redeviennent plus attractives après l'éclosion des larves. Un extrait de pygidium, realise à partir du dlchlorométhane est aussl attractive qu'une femelle vierge. Ces différents résultats démontrent revolution progressive, de remission de la phéromone et celle des glandes pygldials au cours de la vie imaginale.

Type
Research Articles
Copyright
Copyright © ICIPE 1993

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