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The Scientific World Journal
Volume 2013 (2013), Article ID 484536, 11 pages
http://dx.doi.org/10.1155/2013/484536
Research Article

Storage Insects on Yam Chips and Their Traditional Management in Northern Benin

1Laboratory of Agricultural Biodiversity and Tropical Plant breeding (LAAPT), Faculty of Sciences and Technology (FAST-Dassa), University of Abomey-Calavi (UAC), P.O. Box 526, Cotonou, Benin
2Crop, Aromatic and Medicinal Plant Biodiversity Research and Development Institute (IRDCAM), 071 BP 28 Cotonou, Benin
3Institut International d'Agriculture Tropicale (IITA), 08 BP 0932 Cotonou, Benin
4Service de la Protection des Végétaux et du Contrôle Phytosanitaire, Direction de l’Agriculture, BP 58 Porto-Novo, Benin
5Bioversity International, Office of West and Central Africa, 08 BP 0932 Cotonou, Benin
6National Herbarium, Department of Botany and Plant Biology, Faculty of Sciences and Technology (FAST), University of Abomey-Calavi (UAC), P.O. Box 526, Cotonou, Benin
7Laboratory of Biochemistry and Molecular Biology, Faculty of Sciences and Technology (FAST), University of Abomey-Calavi (UAC), P.O. Box 526, Cotonou, Benin

Received 20 January 2013; Accepted 11 February 2013

Academic Editors: G. E. Brust, A. Ferrante, and J. R. Qasem

Copyright © 2013 Y. L. Loko et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Twenty-five villages of Northern Benin were surveyed to identify the constraints of yam chips production, assess the diversity of storage insects on yam chips, and document farmers' perception of their impacts on the stocks and their traditional management practices. Damages due to storage insects (63.9% of responses) and insufficiency of insect-resistant varieties (16.7% of responses) were the major constraints of yam chips production. Twelve insect pest species were identified among which Dinoderus porcellus Lesne (Coleoptera, Bostrichidae) was by far the most important and the most distributed (97.44% of the samples). Three predators (Teretrius nigrescens Lewis, Xylocoris flavipes Reuter, and Alloeocranum biannulipes Montrouzier & Signoret) and one parasitoid (Dinarmus basalis Rondani) all Coleoptera, Bostrichidae were also identified. The most important traditional practices used to control or prevent insect attack in yam chips were documented and the producers' preference criteria for yam cultivars used to produce chips were identified and prioritized. To further promote the production of yam chips, diversification of insect-resistant yam varieties, conception, and use of health-protective natural insecticides and popularization of modern storage structures were proposed.