Browsing by Author "Suleiman, Mustapha"

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    Pesticidal evaluation of teak and almond ethanol leaf extracts against two insect pests of sweet potato (Ipomea batatas L.)
    (Tropical Agriculture, 2022) Yusuf, Sa'adat Yetunde; Musa, Abdulrasak Kannike; Suleiman, Mustapha; Lawal, Mujidat Temidayo
    The cultivation of sweet potatoes is constrained by insect pests. This had led to the use of synthetic insecticides which are unsafe for humans and the environment. Although various studies have investigated the single application of plant material to control pests, this study employed the combination of two botanicals to suppress them. The aim was to evaluate the pesticidal effectiveness of teak and almond ethanol leaf extracts against Phyllotreta cruciferae and Cylas puncticollisinfesting sweet potato. The experiment was arranged in a randomised block design with three replications. The various treatments employed were single applications of almond (AL) and teak leaf (TL) extracts at 15% and 25% concentrations; mixed application of AL and TL extracts at AL15% + TL15%, AL15% + TL25%, AL25% + TL15% and, AL25% + ATL25% respectively, cypermethrin (0.15%) and a control. Data were collected on the number of the insect pests after treatments, sweet potato yield, and phytochemical screening of the botanicals. Analysis of variance indicated that the combination of AL and TL at 25% each significantly (P ≤ 0.05) lowered the population of insect pests to a level comparable to cypermethrin and lower than the single applications of the botanicals. There was a significant increase in yield on plots treated with AL + TL at 25% concentration each. Phytochemical analysis indicated the presence of some bioactive compounds in the botanicals. The combination of different botanicals may be a plausible sustainable alternative to synthetic pesticides in pest management
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    Sesamum indicum and Trichilia heudelotii N-hexane and Ethanol Extracts: Ef-fective Remedy Against Callosobruchus maculates F. (Coleoptera: Chrysomeli-dae) Infesting Cowpea Grains
    (Selcuk Journal of Agriculture and Food Sciences, 2020-11) Ilesanmi, T.O.; Awolola, G.V.; Uddin II, R.O.; Suleiman, Mustapha; Lawal, Mujidat Temidayo
    Synthetic pesticides usage to prevent cowpea weevils have been reported to be harmful, sometimes leading to the untimely demise of consumers by 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 leaf and seed and; Trichilia heudelotii leaf to control Callosobruchus maculatus infesting grains of cowpea. Methods employed involved dressing cowpea seeds (100 g) with the botanical extracts at 0 (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 replicates and 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. Results presented revealed that the N-hexane and ethanol extracts of both sesame and T. heudelotii were significantly (p < 0.05) effective mostly at 1.5 ml in controlling the weevil when compared to the control. Phytochemical analysis indicated the presence of some useful bioactive compounds in the extracts. Observation on weight loss of cowpea revealed that all the various treatment especially at 1.5 ml sustained a significant (p < 0.05) weight compared to the control (40.00±6.67) 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