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Effects of covering highland banana stumps with soil on banana weevil Cosmopolites sordidus (Coleoptera: Curculionidae) oviposition

Published online by Cambridge University Press:  28 February 2007

M. Masanza ,
C.S. Gold ,
A. van Huis  and
P.E. Ragama
M. Masanza
Affiliation:
International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
C.S. Gold*
Affiliation:
International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
A. van Huis
Affiliation:
Laboratory of Entomology, Wageningen University, PO Box 8031, Wageningen, 6700 EH, The Netherlands
P.E. Ragama
Affiliation:
International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
*
*Email: c.gold@cgiar.org
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Abstract

The effect of covering post-harvest banana stumps with soil on banana weevil Cosmopolites sordidus (Germar) oviposition levels was investigated at three locations, Sendusu, Kawanda Agricultural Research Institute (KARI) and Ntungamo district of southwestern Uganda. In the first experiment oviposition levels were assessed in a banana system comprising growing plants and residues. Oviposition increased on sword suckers, reaching a peak 1–7 days after harvest and decreased thereafter. In the second experiment conducted on farmers' fields, corms received 70% of the eggs and pseudostems 30%. The area 5–10 cm below the collar received 27% of the eggs, the area 0–5 cm above the collar 30% and the area 5–10 cm above the collar 0.3%. The remaining eggs (43%) were laid 0–5 cm below the collar. The effect of stump height and covering the stumps was evaluated in both the wet and the dry seasons at Kawanda and Ntungamo. Cutting stumps to the ground level alone had no effect on oviposition. Covering post-harvest banana stumps reduced C. sordidus oviposition in the wet but not in the dry season.

Keywords

bananabanana weevilCosmopolites sordiduscrop sanitationcultural control
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 25 , Issue 1 , March 2005 , pp. 19 - 24
Copyright
Copyright © ICIPE 2005

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