African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6560

Full Length Research Paper

Insecticidal effect of Jatropha curcas L. seed oil on Callosobruchus maculatus Fab and Bruchidius atrolineatus Pic (Coleoptera: Bruchidae) on stored cowpea seeds (Vigna unguiculata L. Walp.) in Niger

Zakari ABDOUL HABOU
  • Zakari ABDOUL HABOU
  • Institut National de Recherche Agronomique (INRAN) BP 429, Niger.
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Adamou HAOUGUI
  • Adamou HAOUGUI
  • Institut National de Recherche Agronomique (INRAN) BP 429, Niger.
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Adamou BASSO
  • Adamou BASSO
  • Institut National de Recherche Agronomique (INRAN) BP 429, Niger.
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Toudou ADAM
  • Toudou ADAM
  • Faculty of Agronomy, Abdou Moumouni University of Niamey, BP 10960, Niger.
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Eric HAUBRUGE
  • Eric HAUBRUGE
  • Unité d’Entomologie fonctionnelle et évolutive, Gembloux Agro-Bio Tech, Liege University, Passage des Déportés 2, B-5030 Gembloux, Belgium.
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François J. VERHEGGEN
  • François J. VERHEGGEN
  • Unité d’Entomologie fonctionnelle et évolutive, Gembloux Agro-Bio Tech, Liege University, Passage des Déportés 2, B-5030 Gembloux, Belgium.
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  •  Received: 28 June 2013
  •  Accepted: 12 June 2014
  •  Published: 04 August 2014

Abstract

We report the insecticidal efficacy of Jatropha curcas seed oil against two bruchid beetle species, Callosobruchus maculatus Fab and Bruchidius atrolineatus Pic, devastating stored cowpea seeds (Vigna unguiculata). J. curcas oil concentrations ranging from 0.0, 0.25, 0.5, 1.5, 2.5, 5.0 and 7.5 ml were mixed with 200 g of cowpea seeds before introduction of 10 pairs (5 males and 5 females) of C. maculatus or B. atrolineatus as the case may be. Mortality, fecundity and rate of emergence were observed and compared with untreated control and a standard (Deltamethrin). J. curcas oil reduced adult survival in both species, B. atrolineatus being more sensitive than C. maculatus. Oviposition was also reduced by 85 to 90% in the females of both species after exposure to 2.5 ml of J. curcas oil solution. Only 9% of C. maculatus nymphs emerged as adults in seeds treated with 2.5 ml of oil. In B. atrolineatus, emergence was reduced to 12% in seeds treated with 1.5 ml of oil.

 

Key words: Natural insecticide, Jatropha curcas oil, pea beetle, cowpea seed.