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    Impact of host plant species and whitefly species on feeding behavior of Bemisia tabaci

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    U19ArtMilenovicImpactInthomNodev.pdf (2.275Mb)
    Date
    2019-01-22
    Author
    Milenovic, M.
    Wosula, E.N.
    Rapisarda, C.
    Legg, J.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Whiteflies of the Bemisia tabaci species complex are economically important pests of cassava. In Africa, they cause greatest damage through vectoring viruses responsible for cassava mosaic disease and cassava brown streak disease. Several cryptic species from the B. tabaci complex colonize cassava and neighboring crops, but the feeding interactions between the different crops and B. tabaci species are unknown. The electrical penetration graph (EPG) technique makes it possible to conduct detailed feeding studies of sap-sucking insects by creating an electric circuit through the insect and the plant. The apparatus measures the voltage fluctuations while the wired-up insect feeds and produces graphs that describe feeding behavior. We utilized EPG to explore the feeding behavior of cassava-colonizing whiteflies (SSA1-SG3) on cassava, sweet potato, tomato, and cotton; and sweet potato-colonizing whiteflies (MED and IO) on cassava and sweet potato. Results show that: (1) feeding of SSA1-SG3 is not restricted to cassava. The least preferred host for SSA1-SG3 was tomato, where probing was delayed by 99 min compared to 10 min on other hosts, furthermore mean duration of phloem ingestion events was 36 min compared to 260 min on cassava. (2) Feeding of MED on cassava appeared to be non-functional, as it was characterized by short total phloem ingestion periods (<1 h) and few, short ingestion events, in contrast to feeding on sweet potato which was characterized by long phloem ingestion periods (>5 h). (3) Wire diameter affects the feeding in a statistically and practically significant manner. Implications for whitefly control and studies of host whitefly resistance are discussed.
    https://dx.doi.org/10.3389/fpls.2019.00001
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5842
    Non-IITA Authors ORCID
    EVERLYNE WOSULAhttps://orcid.org/0000-0001-5693-0889
    James Legghttps://orcid.org/0000-0003-4140-3757
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3389/fpls.2019.00001
    Research Themes
    PLANT PRODUCTION & HEALTH
    IITA Subjects
    Pests Of Plants; Plant Health; Plant Production
    Agrovoc Terms
    Cassava; Sweet Potatoes; Bemisia Tabaci; Feeding Habits; Whiteflies
    Regions
    Africa; East Africa
    Countries
    Tanzania
    Journals
    Frontiers in Plant Science
    Collections
    • Journal and Journal Articles4835
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