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    Life history and temperature-dependence of cassava-colonising populations of Bemisia tabaci

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    Journal Article (1.963Mb)
    Date
    2020-06-17
    Author
    Aregbesola, O.Z.
    Legg, J.P.
    Lund, O.S.
    Sigsgaard, L.
    Sporleder, M.
    Carhuapoma, P.
    Rapisarda, C.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    The whiteflies belonging to the species group Bemisia tabaci transmit viruses that are the greatest constraint to the production of cassava, Africa’s most important food security crop. We studied the life history of an endemic African population of B. tabaci SSA-ESA at six constant temperatures (16, 20, 24, 28, 32, 36 °C) in controlled environment chambers, and for 10 generations in the field. Oviposition occurred between 20 and 28 °C, with highest fecundity (114.5 ± 88.2) eggs per female at 20 °C. Similarly, B. tabaci adult females average survival time was longest (19.7 days) at 24 °C, and shortest (8.5 days) at 36 °C. Immature development time decreased with increasing temperature from 59.3 days at 16 °C to 16.3 days at 28 °C, and increased above 28 °C. A constant temperature of 36 °C was lethal to eggs and first instars and no immature stage developed further to adults at this temperature. Several temperature-driven models were fitted for describing the species development, survival and reproduction using Insect Life Cycle Modelling (ILCYM®) software. Median temperature-dependent development rates in individual immature life stages were statistically described by Taylor, Brière 1 and Tb (Logan) models. Temperature-dependent mortality and senescence rates in immature stages were described by using parabolic nonlinear models. The longevity of adult females and oviposition time was best described by the Weibull distribution. Maximum population growth was predicted between 26 and 28 °C. These results will be useful for spatio-temporal analysis of climate change impacts on the distribution and abundance of this pest.
    https://dx.doi.org/10.1007/s10340-020-01249-z
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7670
    IITA Authors ORCID
    Oluwatosin Zacheous Aregbesolahttps://orcid.org/0000-0003-3971-0344
    James Legghttps://orcid.org/0000-0003-4140-3757
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1007/s10340-020-01249-z
    Research Themes
    Plant Production and Health
    IITA Subjects
    Agronomy; Cassava; Pests of Plants; Plant Breeding; Plant Health; Plant Production
    Agrovoc Terms
    Bemisia Tabaci; Life Cycle; Temperature; Africa; Cassava; Pest Insects
    Regions
    Africa; East Africa
    Countries
    Tanzania
    Hubs
    Central Africa Hub
    Journals
    Journal of Pest Science
    Collections
    • Journal and Journal Articles5286
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