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Parasitism of Descampsina Sesamiae (Mensil) on Sesamia Species in Sugar-Cane in Southern Ghana

  • M. A. Sampson
  • R. Kumar
Research Article

Abstract

Observation on natural enemies of the stem-borer complex on sugar-cane in southern Ghana indicated that Descampsina sesamiae Mensil (Diptera:Tachinidae) is the most important larval parasite of Sesamia species. The relative abundance of this tachinid parasite appeared to vary with the rainfall pattern throughout the year and with the phenology of the sugar-cane plant. The rate of parasitism was found to be higher in the outgrowers fields than in the sugar estate’s fields. Differences in cultural practices used as well as the type of vegetation bordering the sugar-cane fields, were believed to be responsible for the difference in the rate of parasitism of D. sesamiae on Sesamia species.

Key Words

Parasite abundance Sesamia cultural practice tachinidae sugar-cane Ghana 

Résumé

Une observation des ennemis naturels du complexe de fouisseurs à tige de la canne a sucre, au sud du Ghana, a indique que Descampsina sesamiae Mensil (Diptera: Tachinidae), est la plus importante larve parasitaire des especes de Sesamiae. L’abondance relative de ce parasite varie avec le modèle pluviométrique, pendant toute l’année, et avec l’adaptabilité de la canne à sucre aux conditions climatiques. On a trouvé que le degré de parasitisme était plus élevé dans des pousses sauvages que dans des plantations sucrières. On croit que les différences existant dans des pratiques culturelles en cours, aninsi que le type de végétation bordant le champ de canne à sucre seroient responsables de la difference du degré de parasitisme de Descampsina sesamiae, sur des espèces de Sesamiae.

Mots Cléf

Le parasite l’abondance les Sesamiae la pratique culturelle les Tachinidae la canne à sucre le Ghana 

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References

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Copyright information

© ICIPE 1986

Authors and Affiliations

  • M. A. Sampson
    • 1
  • R. Kumar
    • 1
  1. 1.Department of Biological SciencesRivers State University of Science and TechnologyPort HarcourtNigeria

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