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    Fusarium species from the cassava root rot complex in West Africa

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    Bandyopadhyay, Cassava Fusarium paper in Phytopathology.pdf (108.6Kb)
    Date
    2006
    Author
    Bandyopadhyay, Ranajit
    Mwangi, M.
    Aigbe, S.O.
    Leslie, John F.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Fusarium species are a significant component of the set of fungi associated with cassava root rot. Yield losses due to root rot average 0.5 to 1 ton/ha but losses >3 ton/ha, an equivalent of 15 to 20% yield, often occur. This paper reviews previous work on cassava root rot and summarizes a few recent studies on Fusarium species associated with the disease. Our studies in Cameroon showed that 30% of rotted tubers were infected by Fusarium spp. 12 months after planting and represented 25% of all the fungal isolates recovered. Other commonly recovered fungi were Botryodiplodia theobromae and Armillaria spp. Numerous and diverse species of Fusarium were associated with rotted cassava roots in Nigeria and Cameroon. At least 13 distinct amplified fragment length polymorphism (AFLP) groups of Fusarium were distinguishable, each group probably a distinct species, and many of them might represent previously undescribed Fusarium species. The two largest of the AFLP groups correspond to F. oxysporum and F. solani species complex. The distribution of Fusarium spp. varied among countries and among locations within a country, suggesting that germ plasm resistant at one location may not be resistant at another. Fusarium spp. also cause seedling blight of cassava and can be recovered from the stems of infected plants up to 1 m above the ground. Therefore, the pathogen can spread with stems cut as planting material. Fusarium spp. also can colonize Chromolaena odorata, the dominant weed in short fallows, which could further complicate management efforts by serving as an alternative host for strains that colonize cassava.
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/3031
    IITA Subjects
    Disease Control; Farm Management; Food Security; Plant Breeding; Plant Genetic Resources; Agribusiness; Plant Production; Pests Of Plants; Cassava; Plant Diseases; Handling, Transport, Storage And Protection Of Agricultural Products
    Agrovoc Terms
    Fusarium Species; Cassava Root Rot; Tuberous Roots; Pathogens; Trichoderma Species; Armillaria Species
    Regions
    Africa; Acp; West Africa; North America
    Countries
    Nigeria; United States
    Collections
    • Journal and Journal Articles4835
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