• Login
    View Item 
    •   Repository Home
    • Research Publications
    • School of Pure and Applied Sciences
    • Department of Biological Sciences
    • View Item
    •   Repository Home
    • Research Publications
    • School of Pure and Applied Sciences
    • Department of Biological Sciences
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Performance of a semiochemical-baited autoinoculation device treated with Metarhizium anisopliae for control of Frankliniella occidentalis on French bean in field cages

    Thumbnail
    View/Open
    FULL TEXT (126.9Kb)
    Date
    2011-12-16
    Author
    Niassy, S.
    Maniania, N. K.
    Subramanian, S.
    Gitonga, L. M.
    Ekesi, S.
    Metadata
    Show full item record
    Abstract
    The performance of an autoinoculation device was evaluated in field cage experiments for control of Western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), in French bean, Phaseolus vulgaris L. var. Samantha (Fabaceae). Treatments consisted of a fungus-treated device with and without semiochemical (Lurem-TR), and a fungusfree device as control; the fungus used was Metarhizium anisopliae (Metchnikoff) Sorokin (Hypocreales: Clavicipitaceae). The overall mean number of conidia acquired by a single insect was higher in the fungus-treated semiochemical-baited device than in the device without 10 × 0.6 ± semiochemical: 5.04 10 × 0.4 ± vs. 2.24 conidia per insect. The overall thrips mortality was also higher in the semiochemical-baited device than in the device without the 3.5%. Conidial viability was not ± 3.9 vs. 41.7 ± semiochemical: 59.3 affected in the M. anisopliae-treated device without days after treatment, whereas it was considerably semiochemicals, 7 days post-inoculation 1.1%, 2 and 7 ± 1.3 to 6.5 ± decreased – from 81.0 – in the M. anisopliae-treated semiochemical-baited device. Thrips mortality was positively correlated with M. anisopliae conidial viability, and conidial viability was negatively correlated with conidial acquisition. This suggests that the semiochemical volatiles reduced the conidial viability, which in turn resulted in significant reduction in thrips mortality, despite the highest conidial acquisition in the semiochemical-baited fungus-treated device. Thrips density per plant was significantly reduced in both fungus-treated 1.7 adults per plant; without ± treatments (with semiochemical: 8.7 1.4 adults per plant) compared with the fungus-free ± semiochemical: 6.6 2.6 adults per plant). These results demonstrate the ± control (19.8 potential for an autoinoculation device strategy for the control of thrips, particularly in screenhouses.
    URI
    https://doi.org/10.1111/j.1570-7458.2011.01203
    https://karuspace.karu.ac.ke/handle/20.500.12092/2678
    Collections
    • Department of Biological Sciences [28]

    Karatina University copyright © 2017-2019  | Powered by DSpace
    Contact Us | Send Feedback | OAI-PMH Compliant
    Theme by Systems Librarian
      

     

    Browse

    All of RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Karatina University copyright © 2017-2019  | Powered by DSpace
    Contact Us | Send Feedback | OAI-PMH Compliant
    Theme by Systems Librarian