Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2767

Full Length Research Paper

Evidence for the presence of a female produced sex pheromone in the banana weevil Cosmopolites sordidus Germar (Coleoptera: Curculionidae)

R. P. Uzakah
  • R. P. Uzakah
  • Department of Crop Protection and Environmental Biology, University of Ibadan, Ibadan, Oyo State, Nigeria.
  • Google Scholar
J. A. Odebiyi
  • J. A. Odebiyi
  • Department of Crop Protection and Environmental Biology, University of Ibadan, Ibadan, Oyo State, Nigeria.
  • Google Scholar
M. F. B. Chaudhury
  • M. F. B. Chaudhury
  • Behavioural and Chemical Ecology Research Unit, International Centre of Insect Physiology and Ecology (ICIPE), Nairobi, Kenya.
  • Google Scholar
A. Hassanali
  • A. Hassanali
  • Behavioural and Chemical Ecology Research Unit, International Centre of Insect Physiology and Ecology (ICIPE), Nairobi, Kenya.
  • Google Scholar


  •  Received: 10 February 2015
  •  Accepted: 30 July 2015
  •  Published: 15 August 2015

Abstract

Behaviour-modifying chemicals like pheromones and kairomones hold a great potential in pest management.  Evidences from mating behaviour studies of the banana weevil, and from the weevil’s responses to their freeze-killed conspecifics, body washes/extracts, live conspecifics (olfactometer studies), and trapped volatiles of mature and immature adults clearly suggest that two types of pheromones are produced in this insect: a female produced sex pheromone and a male produced aggregation pheromone.  Both are perceived by olfactory means. The latter has already been isolated by earlier workers and is in use in control programs. Greater successes may however, be recorded with the control of this pest (e.g. in mating disruptions, mass trappings, pest monitoring) if the female-sex pheromone also gets finally isolated, and used in conjunction with good cultural practices. 
 
Key words: Cosmopolites sordidus, sex pheromone, mating disruptions, bioassays, olfactometer studies, gas chromatographic profiles, electroantennogram studies.