Zoological and Entomological Letters
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P-ISSN: 2788-8428, E-ISSN: 2788-8436

2021, Vol. 1, Issue 2, Part A


Ameliorative potentials of two plant extracts against loss in cowpea seeds infested with Callosobruchus maculatus (F) (Coleoptera: Chrysomelidae)


Author(s): OB Oriolowo, OJ John, M Abdulhamid, Y Salihu, E Ajulo and A Yakubu

Abstract: Ameliorative potentials of ethanolic extracts of fruits of Piper guineense and Syzygium aromaticum in the reduction of quality loss in Callosobruchus maculatus infested stored cowpea Vigna spp. was investigated. Laboratory bioassays for oviposition, emergence and weight loss were conducted using cowpea seeds preserved with the extracts of P. guineense and S. aromaticum. The extracts were prepared by measuring 0.5g, 1.0g and 2.0g of grinded plant powders into 5cm3 of ethanol. The filtrates were then used to treat 10g of cowpea seeds in kilner jars. These concentrations translated into 5%, 10% and 20% of extracts treatment, respectively. Ten pairs of sexed beans weevil were introduced into each treatment jar and four replicates were set for each treatment including control. The experiment was set for forty-two (42) days. Data obtained were analyzed using descriptive statistics of mean, standard deviation, percentage and bar charts. Mean were compared and separated using Analysis of Variance (ANOVA) and Least Significance Difference (LSD), respectively. The result showed that both extracts significantly (P<0.05) reduced oviposition between 27.3-76.8%, emergence between 79.0-100% and weight loss by 90.6-100%. The extracts were able to reduce crude protein loss by 100%, Ash content by 76% and oil extract by 100%. All mineral contents were also preserved by 100%. The study showed that these plant extracts were efficient in preserving the quality of stored cowpea seeds.

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Zoological and Entomological Letters
How to cite this article:
OB Oriolowo, OJ John, M Abdulhamid, Y Salihu, E Ajulo, A Yakubu. Ameliorative potentials of two plant extracts against loss in cowpea seeds infested with Callosobruchus maculatus (F) (Coleoptera: Chrysomelidae). Zool Entomol Lett 2021;1(2):09-12.

Zoological and Entomological Letters