Fungal rotting of cocoyams in storage in Nigeria
1981
Maduewesi, J.N.C. | Onyike, R.C.I. (University of Nigeria, Nsukka. Dept. of Botany)
Cocoyam cormels kept in storage barns at Nsukka were examined for rot development. The origin of rot was investigated, and the fungi associated with it were isolated and tested for pathogenicity on cocoyams. Rot initiation occurred mostly from wounds, especially those produced as a result of detachment of cormels from mother corms. Fusarium solani, Botryodiplodia theobromae, Sclerotium rolfsii, and Rhizopus stolonifer were isolated from the rotting tissue, and inoculation of cormels with each of these fungi resulted in development of rot symptoms. Each of the fungi was consistently reisolated from the rotting tissue arising from inoculation. Rot development was influenced by termperature, the optimum being around 25 degrees centigrade for rots caused by F. solani, B. theobromae, and S. rolfsii.
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