Browsing by Author "Olawuyi, O. J."

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    Antibacterial activities of daldina concentrica
    (2011-01) Jonathan, S. G.; Olawuyi, O. J.; Popoola, O. O.; Aina, D. A.
    Activities of the distilled water, ethanolic and chloroform extracts of Daldina concentrica an ascomycetous fungus was investigated on Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, Bacillus cereus and Staphylococcus aureus) using agar well diffusion method. Ethanolic extract of Daldina concentrica showed significantly antibacterial activity against all the test microorganisms except Bacilllus cereus (P ≤0.05). Staphylococcus aureus was the most sensitive organism to the extracts of this fungus with 17.0mm zone of inhibition with ethanol extract. It was also shown that chloroform extract of Daldinia concentrica possessed higher anti-bacterial activity against the five tested microorganisms. The effect of fresh tissues of the fungus on test bacteria indicated that Proteus mirabilis was the only sensitive organism with 5.0mm zone of inhibition while other bacteria were resistant. The implications of these findings were discussed.
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    Insect and fungal pests of some mushrooms collected from university of Ibadan, Nigeria campus
    (Marsland Press, 2012) Jonathan, S. G.; Popoola, K. O. K.; Olawuyi, O. J.; Ajiboye, M.; Oyelakan, A. O
    Ten mushrooms species collected within the premises of University of Ibadan were examined for infestation of various insect and fungal pests .Insects belonging to the orders; Coleoptera, Hymenoptera, Diptera, and Collembolla were encountered both at the larval and adult stages of life on the collected mushroom samples. Infestation by the order Coleoptera (adult beetle) on Pleurotus squar-rosulus was found to be higher in incidence, with a total number of 17 species which were found at the adult stage of life; but the larva stage were found on Lycoperdon gigantum . Fungal species identified to be Aspergillus niger, Aspergillus terreus, Fusarium redolens, Trichoderma viride, Rhizopus stolonifer and Mucor piriformis were found to be associated with several species of mushrooms.