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International Journal of Tropical Insect Science

, Volume 14, Issue 1, pp 115–126 | Cite as

Mise En Evidence De La Pheromone Sexuelle Chez Les Femelles De Blattella Germanica L.

  • P. G. Tokro
  • R. Brossut
  • L. Sreng
Research Article

Résumé

L’existence d’une phéromone sexuelle femelle attractive à distance et produite par les glandes pygidiales chez B.germanica a été démontrée. L’ultrastructure de l’épithélium glandulaire a montré des cellules épldermiques banales et des cellules du canal associées à des cellules sécrétrices, formant les unités glandulaires de classe 3. Chez la jeune femelle vierge, la couche glandulaire est de faible épaisseur, elle augmente progressivement et atteint son maximun entre les 10ème et 13ème jours. Pendant la gestation, elle diminue considérablement puis reprend sa croissance après le rejet de l’ootbèque. L’attraction des femelles de B. germanica est progressive, elle devient faible pendant la gestation puis les femelles redeviennent plus attractives après l’éclosion des larves. Un extrait de pygidium, réalisé à partir du dlchlorométhane est aussi attractive qu’une femelle vierge. Ces différents résultats démontrent l’évolution progressive, de l’émission de la phéromone et celle des glandes pygidiales au cours de la vie imaginale.

Mots Clés

Blatella germanica phéromone sexuelle femelle volatile glandes pygidiales 

Abstract

A volatile female sex pheromone, secreted by the pygidial glands of Blattella germanica, 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. germanica young virgin females’ attractiveness increased gradually, such attractiveness decreased at mating. After larval emergence, females’ attractiveness was once more enhanced. Dichloromethane extracts of pygidial glands attracted males from a distance. These results demonstrate the pheromone gradual secretion and similarly pygidial glands evolution during adult emergence.

Key Words

Blatella germanica volatile female sex pheromone pygidial glands 

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Copyright information

© ICIPE 1993

Authors and Affiliations

  • P. G. Tokro
    • 1
    • 2
  • R. Brossut
    • 1
  • L. Sreng
    • 1
  1. 1.Université de Bourgogne, Faculté des SciencesLaboratoire de ZoologieDijonFrance
  2. 2.Faculté des Sciences et TechniquesLaboratoire de ZoologieAbidjan 22Côte d’Ivoire

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