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    The yam nematode (Scutellonema bradys), a potential threat to potato (Solanum tuberosum) production in West Africa

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    S11ArtCoyneYamInthomDev.pdf (173.3Kb)
    Date
    2011-10
    Author
    Coyne, D.L.
    Akpheokhai, L.I.
    Adeniran, A.F.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Potato (Solanum tuberosum) production in Africa is rapidly expanding and becoming increasingly important. As its geographical production range broadens, so does its potential to host new pests and diseases. Following the discovery that potato can be affected by Scutellonema bradys, further studies were undertaken to assess its potential pathogenicity on potato under screenhouse and field conditions, and on marketed tubers. Potato plants inoculated with S. bradys produced tubers with substantial cracking and evident tuber rot, compared with tubers from uninoculated plants. Symptoms of nematode infection on tubers included a scaly appearance, surface cracking as well as deeper tissue cracks, distortions, and darkened surface patches. In most cases these patches were related to sub-surface rot. Nematodes were recovered from the soil, roots and tubers of inoculated plants. Eight weeks after inoculation, the reproduction factor of the nematode was greatest (2·0) at the lowest inoculation rate assessed (1000 nematodes per 2·5-L pot) and least (0·4) at the highest inoculation rate (5000 nematodes per pot). In the screenhouse, potato tuber weights were low and mostly unaffected by nematode inoculation rate, except at 5000 nematodes per pot. In the field, non-inoculated plants yielded over nine times more tubers than plants inoculated with 2000 S. bradys. Low densities of S. bradys were also recovered from 10 of 15 (67%) samples collected from market stalls, indicating field infection. This study confirms that potato can host and be damaged by S. bradys, raising its prospect as a likely significant biotic constraint to the crop.
    http://dx.doi.org/10.1111/j.1365-3059.2011.02459.x
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2017
    Digital Object Identifier (DOI)
    http://dx.doi.org/10.1111/j.1365-3059.2011.02459.x
    IITA Subjects
    Pests Of Plants; Plant Diseases; Yam
    Agrovoc Terms
    Pathogenicity; Plant Parasitic Namatodes; Pratylenchus; Yams; Yield Loss; Tuber Rot; Potato Production
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Journals
    Plant Pathology
    Collections
    • Journal and Journal Articles5283
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