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Effect of the stem borer Eldana saccharina (Lepidoptera: Pyralidae) on the yield of maize

Published online by Cambridge University Press:  10 July 2009

N. A. Bosque-Pérez  and
J. H. Mareck
N. A. Bosque-Pérez*
Affiliation:
Maize Research Program, International Institute of Tropical Agriculture, Ibadan, Nigeria.
J. H. Mareck
Affiliation:
Maize Research Program, International Institute of Tropical Agriculture, Ibadan, Nigeria.
*
IITA, c/o L.W. Lambourn & Co., Carolyn House, 26 Dingwall Road, Croydon CR9 3EE, UK.
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Abstract

Field experiments were conducted in the dry season of 1985–86 and the first and second rainy seasons of 1986 at Ibadan, Nigeria, to assess the level of damage and yield reductions caused by Eldana saccharina Walker to maize. Grain weight per plant in artificially infested plots was up to 36% lower than grain weight per plant in insecticide-protected plots. Artificially infested plots had significantly lower 100-grain weight than insecticide-protected ones. The regression coefficient obtained from covariance analysis revealed that 100-grain weight decreased by 0.125 g for each unit increase in the percentage of the stem tunnelled. Infestations of E. saccharina were found to increase significantly the incidence and severity of stalk rots.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 81 , Issue 3 , September 1991 , pp. 243 - 247
Copyright
Copyright © Cambridge University Press 1991

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