Insecticidal Potentials of Capsicum chinense (Jacq) and Garcinia kola (Heckel)  Extracts on Callosobruchus maculatus (Cowpea Weevil) Infestation

Ayodele Oyedeji; Ikpebivie Oku; Franklin Akanwa Eberechi; Digia Linda Imomotimi

doi:10.56919/usci.1222.020

Authors

Ayodele Oyedeji Department of Biological Sciences, Niger Delta University, Wilberforce Island, Nigeria https://orcid.org/0000-0003-2041-6313
Ikpebivie Oku Department of Microbiology, Faculty of Science, Niger Delta University, Wilberforce Island, Nigeria https://orcid.org/0009-0007-7757-0713
Franklin Akanwa Eberechi Department of Plant Science & Biotechnology, Michael Okpara University of Agriculture, Umudike, Nigeria https://orcid.org/0009-0009-1021-9165
Digia Linda Imomotimi Department of Biological Sciences, Niger Delta University, Wilberforce Island, Nigeria https://orcid.org/0009-0000-7347-0976

DOI:

https://doi.org/10.56919/usci.1222.020

Keywords:

Cowpea, weevil, extract, Garcinia kola, Capsicum chinense

Abstract

The use of synthetic organic pesticides has resulted in significant environmental pollution that threatens human health and kills unintended organisms, leading to their eventual restriction and a demand for better alternatives. In this study, the insecticidal potentials of ethanolic extracts of Capsicum chinense and Garcinia kola against Callosobruchus maculatus infestation on cowpea were assessed. From the results, it can be concluded that exposure time and extract concentration increased mortality. The data obtained demonstrated a significant change (p<0.05) in 2 g at 24 hours and 48 hours following exposure. The concentration and time-dependent mortality of C. maculatus in C. chinense extract increased. Mortality was observed 100 % at 4 hours in 2-8 g of the extract when compared to the control. Values ranged from 3.600.55 to 10.000.00 for the effect of the C. chinense extract at 2 g, and there was no discernible difference (p>0.05). The results were considerably different (p<0.05) at 4 g and 6 g compared to the control. The toxicity rate of the plant extracts on the test organism was also seen to increase from day 1 to day 3. The insects moved jerkily and quickly and tended to try to get out of the Petri dishes. The plants' strong insecticidal and repellent properties suggest that they are useful for managing and controlling the cowpea weevil and can be used as an alternative to commercially available harmful insecticides.

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Insecticidal Potentials of Capsicum chinense (Jacq) and Garcinia kola (Heckel) Extracts on Callosobruchus maculatus (Cowpea Weevil) Infestation

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