Fungal rot of yam (Dioscorea rotundata) sold in Warri markets, Nigeria
Publication Date : 17/03/2021
Abstract Observations have shown that one of the problems affecting yams in storage in Warri is fungal rot leading to large economic losses. Hence the need to investigate the fungi associated with yam rot in the metropolis. Fungal decay of white yam (Dioscorea rotundata) sold in Warri markets was investigated. A total of seven fungi namely, Aspergillus niger, Fusarium sp, Fusarium spa, Botyodiplodia theobromae, Penicillium sp and Sclerotium sp were isolated and the fungi belonged to three different classes: Ascomycetes, Zygomycetes and Deuteromycetes. The frequency and the nature of the rot produced were recorded and B. theobromae was the most frequently isolated fungus and pathogenic followed by A. niger and Fusarium sp which was the least. Pathogenicity was proved for all the fungal isolates and thus each of the fungus isolated was associated with the decay. Inoculated tubers were examined and the nature of rot recorded. Key words : Yam cultivars, pathogenicity, isolates, fungi, rot.
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