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Feeding site preference of Sitophilus zeamais (Coleoptera: Curculionidae) on maize grain

Published online by Cambridge University Press:  17 April 2015

L.C. Nwosu ,
C.O. Adedire  and
E.O. Ogunwolu
L.C. Nwosu*
Affiliation:
Department of Biological Sciences, University of Agriculture, Makurdi, P.M.B. 2373, Makurdi, Benue State, Nigeria
C.O. Adedire
Affiliation:
Food Storage Technology Program, Department of Biology, Federal University of Technology, Akure, Ondo State, Nigeria
E.O. Ogunwolu
Affiliation:
Department of Crop and Environmental Protection, University of Agriculture, Makurdi, P.M.B. 2373, Benue State, Nigeria
*
*E-mail: [email protected]
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Abstract

The possibility that Sitophilus zeamais Motschulsky prefers a particular grain side and a grain side area for feeding, and the implications and value in maize programmes' breeding for resistance were investigated in the laboratory at ambient temperature (32.7 °C) and relative humidity (70.4%) using standard techniques. A total of 20 elite maize varieties were used: TZBRCOMP.2C1F1, TZBRELD3C5, PVASYN-3F2, PVASYN-6F2, DTSYN-11-W, BR9943DMRSR, IWDC3SNY-W, WHITEDTSTRSYN, 2008DTMA-YSTR and 2000SYNEE-WSTR, obtained from the Maize Breeding Unit of International Institute for Tropical Agriculture (IITA), Ibadan, Nigeria, and ILE-1-OB, IFEMAIZEHYBRID-1, IFEMAIZEHYBRID-2, IFEMAIZEHYBRID-5, IFEMAIZEHYBRID-6, ARTCOMPOSITE-A-Y, ARTCOMPOSITE-B-Y, ART/98/SW1-OB, ART/98/SW4-OB and ART/98/SW5-OB, obtained from the Institute of Agricultural Research and Training (IAR&T), Moor Plantation, Ibadan, Nigeria. The flat side of a maize grain at the point of penetration was significantly preferred (P≤ 0.05), possibly because it provided much needed space for anchorage and feeding. The South locus of the flattened side of a maize grain was also significantly preferred (P≤ 0.05), possibly because of its soft nature and proximity to the nutrient-rich embryo. The findings of the study have implications for seed viability and can be considered in breeding for resistance to infestation by S. zeamais in stored maize.

Keywords

elite maize varietiesfeedingflat sideresistanceviabilitySitophilus zeamais
Type
Research Papers
Information
International Journal of Tropical Insect Science , Volume 35 , Issue 2 , June 2015 , pp. 62 - 68
Copyright
Copyright © ICIPE 2015 

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