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Effects of precultivation and weed control practices on the activity of epigeal collembola fauna of Cowpea

Published online by Cambridge University Press:  19 September 2011

M. A. Badejo  and
J. I. Olaifa
M. A. Badejo
Affiliation:
Department of Zoology, Department of Plant Science, Obafemi Awolowo University, Ile-Ife
J. I. Olaifa
Affiliation:
Department of Zoology, Department of Plant Science, Obafemi Awolowo University, Ile-Ife
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Abstract

Populations of surface-living Collembola of a 5-year-old fallow were monitored with pitfall traps before and after clearing of vegetation, after ploughing and harrowing and during the different growth phases of cowpea (Vigna unguiculata L. Walp.) with and without weed-control measures. Overall, 8 genera of Collembola were identified in the study site. Songhaica nigeriana was the most abundant species in the study site before clearing. After clearing, the relative abundance of the different genera of Collembola was altered and after ploughing and harrowing, fewer species were recorded. After ploughing, Songhaica nigeriana, Dicyrtoma, Cryptophygus and Sminthurinus spp. were not obtained in the study site. During the vegetative growth phase, Collembola populations remained low in the herbicide-treated plots. The community structures of Collembola varied among the treatments, and temporal changes in the relative abundance of the different genera of Collembola were observed.

Résumé

Les populations de Collemboles vivant en surface dans une jachère vieille de cinq ans ont été observées au moyen des trous-pièges avant et après le défrichement, après labour et hersement et durant les différentes phases de croissance du niébé (Vigna unguiculata L. Walp) avec ou sans mesures de contrôle de mauvaises herbes. En tout, 8 genres de Collemboles ont été identifiés sur le site d'étude. Songhaica nigeriana était l'espèce la plus abondante avant le défrichement. Après le défrichement, l'abondance relative des différents genres de Collemboles avait changé et après labour et hersement moins d'espèces ont été rapportées. Après labour, Songhaica nigeriana, Dicyrtoma, Chryptophygus and Sminthurinus spp. n'ont pas été trouvées sur le site d'étude. Pendant la phase de croissance végétative, les populations de Collemboles sont restées au bas niveau dans les parcelles traitées aux herbicides. Les structures communautaires des Collemboles ont varié parmi les traitements, et des changements temporaires en abondance relative des diffférents genres de Collemboles ont été observes.

Keywords

collembola faunaweed controlcowpeaVigna unguiculatacommunity structurefaune de collembolescontrôle de mauvaises herbesniébéVigna unguiculatastructure communautaire
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 17 , Issue 2 , June 1997 , pp. 193 - 198
Copyright
Copyright © ICIPE 1997

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