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    Distribution of parasitic nematodes in Kenyan rice fields and their relation to edaphic factors, rainfall and temperature

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    S17ArtNamuDistributionInthomDev.pdf (825.6Kb)
    Date
    2017
    Author
    Namu, J.
    Karuri, H.
    Alakonya, A.E.
    Nyaga, J
    Njeri, E.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Rice is the third most important crop in Kenya after maize and wheat. Plant parasitic nematodes (PPN) are a major rice production constraint. The objective of this study was to determine the distribution and abundance of rice PPN in Kenya and their association with environmental variables. Soil and plant samples were collected from rainfed upland and irrigated lowland rice fields in Kirogo, Thiba, Nyangati, Ombeyi, Kombura, Kakola and Mwambe Sub-locations. Twenty-two PPN genera were identified across all Sub-locations with the highest (20) number of nematode genera recorded in rainfed upland rice fields. The nematode genera Scutellonema, Hoplolaimus, Ditylenchus, Hemicycliophora, Heterodera, Paralongidorus and Tylenchus were not recorded in the irrigated lowland rice fields while Criconemella and Tylenchorhynchus were not observed in rainfed upland fields. Canonical correspondence analysis of the relationship between soil properties and nematode abundance revealed a significant (P < 0.05) relationship between PPN abundance and potassium, sodium, sand and clay. The relationship between rainfall, minimum temperature and nematode genera was significant (P < 0.05) while maximum temperature was not significant (P = 0.928). Our results provide critical information for designing nematode management strategies in Kenyan rice fields.
    http://dx.doi.org/10.1007/s40858-017-0194-9
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2403
    Digital Object Identifier (DOI)
    http://dx.doi.org/10.1007/s40858-017-0194-9
    IITA Subjects
    Plant Diseases; Plant Production
    Agrovoc Terms
    Oryza Sativa; Rainfall; Nematodes; Diversity; Temperature; Parasitic Nematodes
    Regions
    Africa; East Africa
    Countries
    Kenya
    Journals
    Tropical Plant Pathology
    Collections
    • Journal and Journal Articles4836
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