Sesamum indicum and Trichilia heudelotii N-hexane and Ethanol Extracts: Effective Remedy Against Callosobruchus maculates F. (Coleoptera: Chrysomelidae) Infesting Cowpea Grains

Authors : Temitope Olawale ILESANMI, Victoria Gbonjubola AWOLOLA, Omotayo Robert UDDIN II, Suleiman MUSTAPHA, Temidayo Mujidat LAWAL

Pages : 214-222

View : 18 | Download : 20

Publication Date : 2020-12-25

Article Type : Research Paper

Abstract :The use of synthetic pesticidesusage to prevent cowpea weevils have been reported to be harmful, sometimes leading to the demise of consumersby ingestion of contaminated grains. To save lives, efforts are intensely made to seek after safer alternatives one in particular, is the use of plant based biopesticides. A study was conducted to investigate the effectiveness of N hexane and ethanol extracts of both sesame insert ignore into journalissuearticles values(Sesamum indicum); leaf and seed and;Trichilia heudelotii leaf to control Callosobruchus maculatusinfesting grains of cowpea. The methods employed involved dressing cowpea seeds insert ignore into journalissuearticles values(100 g); with the botanical crudeextracts at 0 insert ignore into journalissuearticles values(control);, 0.5, 1.0 and 1.5 ml respectively. Next, six pairs of newly emerged adult C. maculatus were introduced into glass vials containing treated seeds in three replicatesand observation was conducted for; adult mortality; emergence of larvae, pupae, and new adults of the insect;weight loss of cowpea grains; and qualitative phytochemical screening. The results presented in this paper revealed that the N-hexane and ethanol extracts of both sesame and T. heudelotii were significantly insert ignore into journalissuearticles values(p < 0.05); effective mostly at 1.5 ml in controlling the weevil when compared to the control. The phytochemical analysis indicated the presence of some useful bioactive compounds in the extracts.The observation on weight loss of cowpea revealed that all the various treatment especially at 1.5 ml sustained a significant insert ignore into journalissuearticles values(p < 0.05); weight compared to the control insert ignore into journalissuearticles values(mean = 40.00); which was lower. A plausible usage of homemade biopesticide using sesame and T. heudelotii could be suggested as additives to cowpea grains in the control of C. maculatus.
Keywords : Pest Control, Callosobruchus Maculatus, Cowpea Grains Plant Extracts, Phytochemical, Botanicals