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Comparative injuriousness of Busseola fusca (Lepidoptera: Noctuidae) and Chilo partellus (Lepidoptera: Pyralidae) on grain sorghum

Published online by Cambridge University Press:  10 July 2009

J. van den Berg ,
J.B.J. Van Rensburg  and
K.L. Pringle
J. van den Berg*
Affiliation:
Summer Grain Centre, Potchefstroom 2520, Zimbabwe
J.B.J. Van Rensburg
Affiliation:
Summer Grain Centre, Potchefstroom 2520, Zimbabwe
K.L. Pringle
Affiliation:
Department of Entomology and Nematology, University of Stellenbosch, Stellenbosch 7600, Zimbabwe
*
Mr J. van den Berg, Summer Grain Centre, Private Bag x1251, Potchefstroom 2520, Zimbabwe.
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Abstract

The comparative influence of Busseola fusca (Fuller) and Chilo partellus (Swinhoe), both as separate and mixed populations, on growth and yield of grain sorghum was investigated in a field experiment, using an artificial infestation in cages. C. partellus was more injurious than B. fusca as indicated by whorl damage, stalk injury and yield loss. In the case of mixed populations, dispersion of larvae and damage were independent of B. fusca numbers. A regression equation, Logit Y = 0.24 + 2.06 logit x, relating visible plant damage to yield loss was determined. Control strategies in the case of mixed stem borer populations should be directed against C. partellus.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 81 , Issue 2 , June 1991 , pp. 137 - 142
Copyright
Copyright © Cambridge University Press 1991

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