Studies on Fungi Isolated From Dioscorea rotundata (YAM) Collected From Open Markets in Lagos Nigeria
Healthy and diseased white yams tubers (Dioscorea rotundata) were collected from three different open markets in Lagos State. Fungi were isolated from the yam twice monthly for three months. The fungi isolated were identified as Aspergillus niger, Aspergillus flavus, Mucor racemosa, Botryodiplodia thoebromae and Macrophomina phaseolina. A. niger and A. flavus were found to be the most prevalent fungi isolates while the occurrence of B. thoebromae, M. phaseolina and Mucor racemosa were less prevalent. Selected fungicides (Captan, Dithane M45, Difolatan and Benlate) were assayed against the fungal isolates. Captan and Dithane showed the highest inhibitory activity against all the isolates. The proximate analysis revealed the real gradual reduction in ash, lipid and crude fibre contents in the diseased yam tubers with reference to healthy yam except protein and moisture that had an insignificant increase in the diseased yam. The results highlight the potential of the fungicides for post-harvest preservation of Dioscorea rotundata in which the viability has been reduced because of post-harvest losses.
Adekunle, A. A. 1997. Fungal Post-Harvest Deterioration in Cucumeropsis Manii Naud-Holl Seeds. Ph.D Thesis, University of Lagos, Nigeria. 250pp.
Adekunle, A. A. and A. M. Ikumapayi. 2006. Antifungal Property and Phytochemical Screening of the Crude Extracts of Funtumia elastic and Mallotus oppositifolius. West Indian Medical Journal. 55(4): 219-223.
Adekunle, A. A. and T. F. Oluyode. 2005. Biodegradation of Crude Petroleum and Petroleum Products by Fungi isolated from two Oil Seeds (Melon and soybean seeds). Journal of Environmental Biology. 26(1): 37-42.
Adeola, A. A., B. O. Otegbayo and S. Ogunnoiki. 2012. Preliminary Studies on the Development and Evaluation of Instant Pounded Yam from Dioscorea alata. Journal of Applied Science and Environmental Management. 16 (3): 287 – 290.
Akinwande, B. A., O. A. Abiodun. I. A. Adeyemi and C. T. Akanbi. 2008. Effect of Steaming method and time on the Physical and Chemical Properties of Flour from Yam Tubers. Available online at: http://www.ajol.info/journals/nifoj (accessed on 4 June, 2014).
Ajayi, A. O. 2011. Sustainable Dietary Supplements: An Analytical Study of African Yam Bean-Sphenostylis sternocarpa and Corn-Zea May. European Journal of Experimental Biology. 1(4): 189-201.
Alinnnor, I. J. and C. O. Akalezi. 2010. Proximate and Mineral Compositions of Discorea rotundata (White Yam) and Colocasia esculenta (White Cocoyam). Pakistan Journal of Nutrition. 9(10): 998-1001.
Amusa, N. A. A. A. Adegbite, S. Muhammed and R. A. Baiyewu. 2003. Yam Diseases and its management in Nigeria. African Journal of Biotechnology. 2(12): 497-502.
Bankole, S. A., A. Osho, A. O. Joda and O. A. Enikuomehin. 2005. Effect of Drying Method on the Quality of ‘Egusi’ Melon Seeds (Colocynthis citrullus L.). African Journal of Biotechnology, 4(8): 799-803.
Bryce, K. 1992. The fifth Kingdom. Mycologue Publications, Ontario. 412pp.
Chinedu, S. N. and C. O. Nwinyi. 2012. Proximate analysis of Sphenostylis stenocarpa and Voadzeia subterranean consumed in South–Eastern Nigeria. Journal of Agricultural Extension and Rural Development. 4(3): 57 – 62.
Chuku, E. C. 2012. Effects of wrapping materials on Mould Growth and Proximate Composition of Pentaclethra macrophylla Benth. Nigerian Journal of Mycology. 4: 57-64.
Dauda, K., C. Brahima, B. Jean, D. Mohammed, S. Sibrina, N. Carine and B. Lezin. 2010. Fungicides and Biological Products Activities towards Fungi causing diseases on banana and vegetable in Cote d’Ivoire, Fungicides, Odile Carisse (Ed.), ISBN:978-953-307-266, In Tech, Available from http://www.intechopen.com/books/fungicides/activity-of-fungicides-and-biological-products-on-fungi-causing-diseases-on-banana-and-vegetable-in (accessed 4 June, 2014).
Deacon, J. W. 1980. Introduction to Modern Mycology. Blackwell Scientific Publications, London. 197pp.
Domoschet, K. H., B. Gams and T. Anderson. 1980. Compendium of soil fungi vol.1. Academic Press, London: 859pp.
Egan, H., H. S. Kirk and R. Sawyer. 1981. Pearson’s Analysis of Foods. Churchill Livingstone Publishers. Edinburgh, Scotland. 596pp.
Ekwu, F. C., N. O. Ozo and O. J. Ikegwu. 2005. Quality of Fufu flour from white yam varieties (Discorea spp.) Nigerian Food Journal. 23: 107-113.
Ezeibekwe, I. O., M. I. Opara and F. N. Mbagwu. 2009. Antifungal Effect of Aloe-vera Gel on Fungal Organisms Associated with Yam (Discorea rotundata,Poir) Rot. Journal of Molecular Genetics. 1(1): 11-17.
Frank, C. O. and C. A. Kingsley. 2014. Proximate Composition, Physiological Changes during Storage, and Shelf Life of Some Nigerian varieties of Yams (Dioscorea species). Journal of Scientific Research and Reports. 3(4): 553-562.
Ikotun, T. 1989. Disease of Yam tubers. International journal of tropical plant disease. 7: 1-21.
Lowry, O. H., Rosebugh, N. J., Faw, A. L. and Randall, R. Z. (1951). Protein Measurements of Folin ciocalteu phenol reagent. Journal of Biological Chemistry, 193: 265-275.
Nwachukwu, E. 2006. Susceptibility of Yam (Dioscorea rotundata) to Biodeterioration following different Chemical Treatment. Journal of sustainable Agriculture and the Environment. 8:39-43.
Ogaraku, A. O. and H. O. Usman. 2008. Storage Rot of Some Yams (Dioscorea spp) in Keffi and Environs, Nasarawa State, Nigeria. Production Agriculture and Technology journal. 4 (2): 22-27.
Okigbo, R. and F. Ikediugwu. 2000. Studies on Biological Control of Postharvest Rot of Yam (Dioscorea spp) with Trichoderma viride. Journal of Phytopathology. 148:351-355.
Okigbo, R. N. and U. O. Ogbonnaya. 2006. Antifungal Effects of Two Tropical Plant Leaf Extracts (Ocimum gratissimum and Aframomum melegueta) on Postharvest Yam (Discorea spp.) Rot. African Journal of Biotechnology. 5(9): 727-731.
Opara, L. 2003. Yams: Post Harvest Operation. Massey University Press, Palmerston North, New Zealand. Pp 7-12.
Osagie, A. 1992. The Yam Tubers in Storage Postharvest Unit, University of Benin, Nigeria. Pp 107-173.
Osunde, Z. D. 2008. Minimizing Postharvest Losses in Yam (Discorea spp.):Treatments and Techniques. In: Food Science and Technology to improve Nutrition and Promote National Development, Robertson, G.L. and Lupien, J.R. (Eds). International Union of Food Science and Taxonomy. Pp. 1-12.
Richmond, D. and E. Somers. 1963. Studies on the Fungitoxicity of Captan. Relation between the sulfhydryl content of Fungal spores and their uptake of Captan. Annal of Applied Biology. 52:327–336.
Sanyaolu, A. A., A. A. Adekunle and A. Osuntoki. 2014. The Effects of Post-harvest Mycodeterioration on the Proximate Composition of Irvingia gabonensis seeds, International Journal of Phytopathology. 3(1): 41-48.
Shajeela, P. S., V. R. MohanJesudas. L. L and P. T. Soris. 2011. Nutritional and antinutritional evaluation of wild yam (Dioscorea spp.). Tropical and Subtropical Agroecosystems. 14: 723-730.
Taskeen-Un-Nisa, A., A. Wani, M. Bhat, S. Pala and R. Mir. 2011. In vitro inhibitory effect of fungicides and botanicals on mycelial growth and spore germination of Fusarium oxysporum. Journal of Biopesticides. 4(1): 53-56.
- There are currently no refbacks.
Copyright (c) 2015 Adeogun O. Oluwagbenga, Adekunle A. Adedotun, Samuel O. Temitope, Ebabhi A. Margaret
This work is licensed under a Creative Commons Attribution 4.0 International License.