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Efficacy of powdered maize cobs against the maize weevil Sitophilus zeamais (Coleoptera: Curculionidae) in stored maize in Senegal

Published online by Cambridge University Press:  22 May 2012

Momar Talla Gueye ,
Papa Seyni Cissokho ,
Georg Goergen ,
Saliou Ndiaye ,
Dogo Seck ,
Goulé Gueye ,
J.-P. Wathelet  and
Georges Lognay
Momar Talla Gueye*
Affiliation:
Institut de Technologie Alimentaire, Hann-Dakar, BP2765, Senegal
Papa Seyni Cissokho
Affiliation:
Institut de Technologie Alimentaire, Hann-Dakar, BP2765, Senegal
Georg Goergen
Affiliation:
International Institute of Tropical Agriculture, Cotonou, 08 BP 09326, Benin
Saliou Ndiaye
Affiliation:
ENSA, BP A 296 Thiès RP. UFR SADR, Université de Thiès, Senegal
Dogo Seck
Affiliation:
Centre Régional de Recherche en Ecotoxicologie et Sécurité Environnementale (CERES/Locustox), BP 3300, Dakar, Senegal
Goulé Gueye
Affiliation:
BAMTAARE – SODEFITEX, BP 92, Tambacounda, Senegal
J.-P. Wathelet
Affiliation:
Université de Liège, Gembloux Agro-Bio Tech, Unité de Chimie Générale et Organique, 2 Passage des Déportés-5030, Gembloux, Belgium
Georges Lognay
Affiliation:
Université de Liège, Gembloux Agro-Bio Tech, Unité Analyses, Qualité, Risques – Laboratoire de Chimie Analytique, 2 Passage des Déportés-5030 Gembloux, Belgium
*
*E-mail: gueyemt@gmail.com
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Abstract

Powdered maize cobs were tested as an alternative for pesticide use in stored maize. Five doses (2, 4, 6, 8 and 10 g/250 g seed) of powdered maize cobs applied at particle sizes of 1.4 and 0.4 mm diameter were compared with actellic powder against Sitophilus zeamais Motschulsky for 120 days. Mortality and survival data showed that cob powders did not act as fumigant but exerted a potent inhibition of progeny on direct contact with S. zeamais adults. The particle size of powdered cobs had no effect on maize damage and losses. At doses equal to or higher than 6 g powdered maize cobs/250 g grain maize, i.e. 2.4% (w/w), damage to grain was < 5% and weight losses < 1%. The protection offered at the highest dose was comparable to the pesticide control. The use of powdered maize cobs is discussed as a natural alternative to synthetic pesticides for protection of maize against S. zeamais.

Keywords

actellicdoselossesmaize cobsmortalitySitophilus zeamais
Type
Research Paper
Information
International Journal of Tropical Insect Science , Volume 32 , Issue 2 , June 2012 , pp. 94 - 100
Copyright
Copyright © ICIPE 2012

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