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Predatory ground-dwelling beetles (Carabidae and Staphylinidae) in upland rice fields in North Cameroon

Published online by Cambridge University Press:  28 February 2007

N. Woin ,
J.A. Takow  and
P. Kosga
N. Woin*
Affiliation:
Institute of Agricultural Research for Development, PO Box 33, Maroua, Cameroon
J.A. Takow
Affiliation:
Institute of Agricultural Research for Development, PO Box 62, Kumba, Cameroon
P. Kosga
Affiliation:
Institute of Agricultural Research for Development, PO Box 33, Maroua, Cameroon
*
*Email: woin57@hotmail.com
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Abstract

Indicators of diversity (population density, relative number of species and evenness) in ground beetles (Carabidae) and rove beetles (Staphylinidae) in upland rice fields were assessed between 1995 and 1999 at Garoua in the Benue valley in North Cameroon. A total of 4369 beetles belonging to 45 carabid species and 2109 beetles belonging to 31 staphylinid species were caught in pitfall traps. Among the carabid beetles, five species Scarites (Orientolobus) lucidus strigiceps Quedenfeldt, Chlaeniostenus denticulatus elatus (Erichson), Lissauchenius venator (LaFerté), Pheropsophus marginatus (Dejean) and Abacetus crenulatus Dejean, in decreasing order, were dominant. In the staphylinid group, Paederus sabaeus Erichson was the most common, followed by Stenus ravus Puthz and Stenus (Mendicus) senegalensis Bernhauer. The Shannon–Weiner and evenness indices varied slightly from year to year. Diversity values remained relatively low among the staphylinid beetles, revealing that rice fields were underpopulated by this group of polyphagous predators. The features of predatory soil-surface beetles and the role they play as an IPM component in West African rice ecosystems are discussed.

Keywords

diversitycarabid beetlesstaphylinid beetlespredatorsrice fieldsCameroon
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 25 , Issue 3 , September 2005 , pp. 190 - 197
Copyright
Copyright © ICIPE 2005

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