Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2754

Full Length Research Paper

The susceptibility of different maize varieties to post-harvest infestation by Sitophilus zeamais (MOTSCH) (Coleoptera: Cuculionidae)

N. Makate
Department of Biological Sciences, University of Botswana, Private Bag UB 00704 Gaborone, Botswana
Email: [email protected]

  •  Accepted: 29 June 2007
  •  Published: 31 January 2010

Abstract

Nine maize varieties collected at IITA were investigated for their relative susceptibilities to attack by Sitophilus zeamais MOTSCH, an important insect pest of stored maize. The results obtained were summarized using an index of susceptibility which took into account both the F1 progeny developing during the tests and a measure of the average development period of this progeny. The varieties arranged in a descending order of susceptibility were EV-8431-SR, 8321-18, IK85T2 SR-W, DMR-LSR-W, 8516-12, 8644-31, EK 83T2-SR-Y, 8425-8Y and 8505-5. There was a positive correlation between the susceptibility index and certain grain characteristics or factors such as moisture content, imbibitions potential and weight per 1000 seeds.

 

Key words: Sitophilus zeamais, maize susceptibility, insect infestation.