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    Survey of Scutellonema bradys incidence on marketed yam (Dioscorea spp.) in Benin

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    Authors
    Baimey, H.
    Coyne, D.L.
    Labuschagne, N.
    Date
    2009
    Language
    en
    Type
    Journal Article
    Review status
    Peer Review
    Accessibility
    Limited Access
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    Citation
    Baimey, H., Coyne, D. & Labuschagne, N. (2009). Survey of Scutellonema bradys incidence on marketed yam (Dioscorea spp.) in Benin. African Journal of Root and Tuber Crops, 7(1), 8-16.
    Permanent link to cite or share this item: http://hdl.handle.net/10568/90915
    Abstract/Description
    A survey was conducted in the different areas in Bénin where yam (Dioscorea spp) are grown. Yam tubers were assessed visually for dry rot disease associated with the yam nematode, Scutellonema bradys. Assessments were made during February and March in 2002 and 2003 on yam for sale on market stalls. Population density of S. bradys was also determined from 65 sampled yam tubers, selected for exhibiting symptoms of dry rot. Differences among yam cultivars, yam species, sites of tuber origin, and agroecological zones (AEZ) of tuber cultivation, were analyzed. A total of 3222 tubers from 110 market stalls were visually assessed for nematode damage. The percentage of tubers with dry rot caused by S. bradys was low (mean of 3.57%). Symptoms of nematode damage were observed most frequently on cultivar Idjekoka and cultivar Krokotonnè (both D. rotundata) and cultivar Kokoro (D. cayenensis). Population density of S. bradys varied considerably among yam cultivars, yam species, sites of origin of tubers, and the AEZ where tubers were grown. Dioscorea rotundata supported the highest (p≤0.05) nematode population density (mean of 488 S. bradys/g tuber peel) and D. alata the lowest (mean of 4 S. bradys/g tuber peel). No S. bradys were recovered from some cultivars, even though tubers appeared to have dry rot symptoms. Nematode population density as high as 1700/g tuber peel was recorded on cv Yoruba dundu (D. rotundata). The highest number of S. bradys were recovered from the sites Bio Amadou Kpara (mean of 3789 S. bradys/g tuber peel), Monne (2609 S. bradys/g tuber peel), and Nangatori (2316 S. bradys/g tuber peel)
    CGIAR Affiliations
    Integrated Systems for the Humid Tropics; Roots, Tubers and Bananas; Climate Change, Agriculture and Food Security
    AGROVOC Keywords
    PEST; PLANT PARASITIC NEMATODE; STORAGE
    Subjects
    PESTS OF PLANTS; HANDLING, TRANSPORT, STORAGE AND PROTECTION OF AGRICULTURAL PRODUCTS
    Countries
    BENIN
    Regions
    AFRICA; WEST AFRICA
    Investors/sponsors
    International Institute of Tropical Agriculture; United States Agency for International Development
    Collections
    • IITA Journal Articles [1807]

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