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International Journal of Zoology and Applied Biosciences Research Article
Biocidal impact of different formulations based on Carica papaya leaves on the external forms of Callosobruchus maculatus (Fabricius, 1775), the main pest of cowpea stocks in Senegal
A. Faye, D. Ndiaye, T. Diome, M. Faye, M. Sembène
Year : 2025 | Volume: 10 | Issue: 2 | Pages: 32-39
Received on: 12/01/2022
Revised on: 23/01/2025
Accepted on: 24/02/2025
Published on: 31/03/2025
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A. Faye, D. Ndiaye, T. Diome, M. Faye, M. Sembène( 2025).
Biocidal impact of different formulations based on Carica papaya leaves on the external forms of Callosobruchus maculatus (Fabricius, 1775), the main pest of cowpea stocks in Senegal
. International Journal of Zoology and Applied Biosciences, 10( 2), 32-39.
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Abstract
Papaya leaves (Carica papaya) were tested on eggs and adults of the pest Callosobruchus maculatus. Different formulations based on this plant have been applied to these forms of the pest. The results noted high adult mortality varying depending on the doses, duration of exposure and the formulation applied. The crushing of fresh leaves caused considerable mortality in adults through contact. These are spread over time depending on the doses applied, 55.75% (10g) on the 5th day, 100% for high doses (15g and 20g) from the 10th day. The corrected mortalities induced by this formulation on eggs are very high and proportional to the dose (10g, 15g and 20g gave respectively 93.63%, 97.08% and 100% mortalities). Fumigation of fresh crushed leaves also proved effective on adults with mortalities disproportionate to the dose of between 57.97% and 97.82% around the 3rd and 4th day with the application of all doses. It also gave an embryonic mortality of 94.70% whatever the dose applied. The aqueous extract of the powder of dry leaves of this plant (Carica papaya) showed a variation of the effects over time with the application of different concentrations, the highest mortality 22.93% was recorded with concentration C2 on the 2nd day while C1 and C2 induced respective mortalities of 11.47% and 20.02%. At the egg stage, the aqueous extract induced average mortalities disproportionate to the dose with greater mortality in C2 (72.72%).
Keywords
Carica papaya, Callosobruchus maculatus, Fumigation, Contact, Powder, Aqueous extract, Fresh leaves.
