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    Effect of temperature on the survival and infectivity of Pseudotheraptus devastans vector

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    Date
    2004
    Author
    Fokunang, C.
    Dixon, A.
    Ikotun, T.
    Type
    Journal Article
    Review Status
    Peer Review
    Metadata
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    Abstract/Description
    The aim of this study was to investigate under a controlled environment, the effect of temperature on the survival and infectivity of Pseudotheraptus devastans Distant, a cassava anthracnose disease vector. The insect P. devastans was collected from young cassava (Manihot esculenta Crantz) field plots, at the International Institute of Tropical Agriculture, (IITA), Ibadan, Nigeria. A mixture of the different developmental stages of eggs, first to fifth instar nymphs, and adults, were incubated in controlled environment chambers, under various constant temperatures of: 15, 17, 22, 25, 27, 30, and 35°C. Relative humidity at different temperature conditions were recorded and maintained at 90%, 85%, 80%, 75%, 70%, 65%, and 60%, respectively. A significant increase in insect survival was observed between 22 and 27°C temperature conditions while a significant decrease in survival was observed at 15°C and above 30°C. Lesion number, lesion diameter and infectivity among the insect stages varied as a function of temperature and relative humidity. Infectivity was highest at 22–25°C maintained at 75–80% RH and lowest at 15°C and above 30°C maintained respectively, at 65% RH and 90% RH. There was considerable low vector infectivity due to low survival of the insects at extreme temperatures.
    https://doi.org/10.1007/s11046-004-8667-z
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/6260
    Digital Object Identifier (DOI)
    https://doi.org/10.1007/s11046-004-8667-z
    IITA Subjects
    Plant Diseases; Plant Health; Disease Control; Cassava; Pests Of Plants
    Agrovoc Terms
    Cassava; Bugs; Coreidae; Heteroptera; Vectors
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4839
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