Journal of
Stored Products and Postharvest Research

  • Abbreviation: J. Stored Prod. Postharvest Res.
  • Language: English
  • ISSN: 2141-6567
  • DOI: 10.5897/JSPPR
  • Start Year: 2010
  • Published Articles: 156

Full Length Research Paper

Compared efficiency of a commercial Neem oil (TopBio) and synthetic insecticide (Antouka Super®) in the management of Dinoderus porcellus Lesne (Coleoptera: Bostrichidae) infesting yam chips

Joelle Toffa
  • Joelle Toffa
  • Laboratoire d’Entomologie Appliquée (LEnA), Ecole Nationale Supérieure des Biosciences et Biotechnologies Appliquées (ENSBBA)/Université Nationale des Sciences, Technologies, Ingénierie et Mathématiques d'Abomey au Bénin, B.P. 14. Dassa, Bénin.
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Yeyinou Laura Estelle Loko
  • Yeyinou Laura Estelle Loko
  • Laboratoire d’Entomologie Appliquée (LEnA), Ecole Nationale Supérieure des Biosciences et Biotechnologies Appliquées (ENSBBA)/Université Nationale des Sciences, Technologies, Ingénierie et Mathématiques d'Abomey au Bénin, B.P. 14. Dassa, Bénin.
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Elie Ayitondji Dannon
  • Elie Ayitondji Dannon
  • International Institute of Tropical Agriculture (IITA) 08 B.P. 0932. Tri Postal. Cotonou, Bénin.
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Karim Zanzana
  • Karim Zanzana
  • International Institute of Tropical Agriculture (IITA) 08 B.P. 0932. Tri Postal. Cotonou, Bénin.
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Josky Adikpeto
  • Josky Adikpeto
  • Laboratoire d’Entomologie Appliquée (LEnA), Ecole Nationale Supérieure des Biosciences et Biotechnologies Appliquées (ENSBBA)/Université Nationale des Sciences, Technologies, Ingénierie et Mathématiques d'Abomey au Bénin, B.P. 14. Dassa, Bénin.
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Noel Bada
  • Noel Bada
  • Laboratoire d’Entomologie Appliquée (LEnA), Ecole Nationale Supérieure des Biosciences et Biotechnologies Appliquées (ENSBBA)/Université Nationale des Sciences, Technologies, Ingénierie et Mathématiques d'Abomey au Bénin, B.P. 14. Dassa, Bénin.
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Appolinaire Adandonon
  • Appolinaire Adandonon
  • Ecole de Gestion et de Production Végétale et Semencière (EGPVS)/Université Nationale d'Agriculture (UNA), 08 BP1055 Cotonou, Rep. Benin.
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  •  Received: 10 July 2021
  •  Accepted: 05 October 2021
  •  Published: 31 October 2021

Abstract

Dinoderus porcellus Lesne is the main pest of stored yam chips in West Africa. Despite their negative impact on the environment and human health, synthetic chemical pesticides are the main control method used by farmers for yam chips protection. This study aims to evaluate the biological effects of different doses (2.5 and 5%) of a commercial Neem oil (TopBio) and the chemical insecticide, Antouka Super® (Permethrin 3 g / kg + pyrimiphos 16 g / kg) against D. porcellus fed on yam chips. We evaluated the contact toxicity by topical application, the repellent activity, and ingestion toxicity of both products. Results revealed that D. porcellus adults were more sensitive to contact with Neem oil (LC50 = 2.17 μl/adult) than with the chemical insecticide (LC50 = 644.93 μl/adult) at 72 h post-treatment. The Neem oil (TopBio) also exhibited a strong repulsion (Class V) against D. porcellus at all tested concentrations. Antouka Super® at 5% was more effective against D. porcellus by ingestion with a corrected mortality percentage of 81.05 ± 11.00% three days post-treatment versus 15.73 ± 11.36% with Neem oil. The lowest weight loss of treated yam chips was obtained with Antouka (0.06 ± 0.02%) comparatively to the Neem oil at 5% (2.12 ± 0.42%). Our study showed that Neem oil (TopBio) is a contact biocide with a highly repulsive potential for integrated management of D. porcellus adults in stored yam chips.

Key words: Dinoderus porcellus, yam chips, contact toxicity, repellency, ingestion, bioinsecticide.