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Research Article

Academia Journal of Agricultural Research 6(10): 339-345, October 2018
D OI: 10.15413/ajar.2018.0142
ISSN: 2315-7739
2018 Academia Publishing

Abstract

 

Bio-efficacy of some tropical plant extracts as storage protectants against Callosobruchus maculatus Fabricius (Coleoptera: Chrysomelidae)
 

Accepted 16th October, 2018
 

Olusola M. Obembe1, Durojaye O. Ojo2* and Olumuyiwa T. Omotoso3

1Department of Plant Science and Biotechnology, Plant Resources Management Programme, Ekiti State University, P.M.B 5363, Ado-Ekiti, Nigeria.
2&3Department of Zoology and Environmental Biology, Ekiti State University, P.M.B. 5363, Ado Ekiti, Nigeria.

 

A study was conducted to evaluate the insecticidal activity of oil extracts and essential oil extracts of six tropical plants, namely: Eugenia aromatica, Hyptis suaveolens, Eucalyptus citriodora, Cymbopogon citratus, Azardirachta indica and Citrus sinensis against cowpea beetle and Callosobruchus maculatus Fabricius using insect mortality, oviposition and adult emergence as indices. Result obtained revealed that all test plant extracts exhibited high mortality action against the cowpea beetle, C. maculatus showing 100% beetle mortality with concentrations of 2, 3 and 4% v/w in day 4 of exposure to the extracts. All extracts significantly suppressed oviposition by the insects and totally stopped adult emergence while the essential oil caused 100% mortality at the first exposure and hence, prevented oviposition and adult emergence. All extracts used have potentials for use as alternative crop protectants against C. maculatus.

Key words: Insecticidal, essential oil, Eugenia aromatica, Hyptis suaveolens, Eucalptus citriodora, Cymbopogon citratus, Azardirachta indica, Citrus sinensis, Callosobruclus maculatus, moratlity, oviposition, adult emergence.

 

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Cite this article as:

Obembe OM, Ojo DO, Omotoso OT (2018). Bio-efficacy of some tropical plant extracts as storage protectants against Callosobruchus maculatus Fabricius (Coleoptera: Chrysomelidae). Acad. J. Agric. Res. 6(10): 339-345.

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