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Observations on the pest status of the striped bean weevil Alcidodes leucogrammus Erichs. on cowpea under intercropping systems in kenya

Published online by Cambridge University Press:  19 September 2011

B. Amoako-Atta
B. Amoako-Atta*
Affiliation:
International Centre of Insect Physiology and Ecology, (ICIPE), P.O. Box 30772, Nairobi, Kenya
*
*Current Address: College of Agriculture and Forestry, University of Liberia, Monrovia, Liberia.
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Abstract

Incidence and extent of damage resulting from attack by the striped bean weevil Alcidodes leucogrammus Erichs, were assessed by random sampling of cowpea plants in monocropped and within maize-cowpea-sorghum intercropping combinations at two locations. The biology and damage symptoms caused by the bean weevil are discussed. The effect of A. leucogrammus incidence on cowpea nodulation is evaluated and evidence presented that the weevil attack causes a reduction in the number of nodules. Emma 60, a local cowpea cultivar, exhibits some degree of resistance against A. leucogrammus (P < 0.05). Sorghum–cowpea intercropping combinations have significantly fewer weevils (P < 0.05) possibly as a result of the close spacing and tillering capacity of the sorghum companion crop which prevents or obstructs the weevil migration between rows.

Keywords

Alcidodes leucogrammusstriped bean weevilcowpeanodulationintercropping
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 4 , Issue 4 , December 1983 , pp. 351 - 356
Copyright
Copyright © ICIPE 1983

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