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    Description

    To date, there have been no reports of Dalmatian toadflax serving as a host for cucumber mosaic virus (CMV). Infestations of Dalmatian toadflax may serve as a reservoir of CMV, thereby facilitating aphid transmission of CMV to both agricultural crops and native plants. The goal of this study was to determine whether Dalmatian toadflax is a host for CMV. Dalmatian toadflax seedlings were randomly assigned to two treatments (18 replicates/treatment): no inoculation (control) and inoculation with CMV (Fast New York strain). The Dalmatian toadflax seedlings were inoculated by standard mechanical methods and tested for the presence of CMV using enzyme-linked immunosorbent assay (ELISA). Ten of the 18 CMV-inoculated toadflax plants tested positive for the virus; 6 of the 18 displayed systemic mosaic chlorosis and leaf curling. All control plants tested negative. Transmission electron microscopy obtained from CMV-positive plants confirmed the presence of CMV based on physical properties. To verify CMV infestation, tobacco plants were assigned to the following treatments (six replicates/treatment): no inoculation (control), CMV-negative (control) inoculation, and a CMV-positive inoculation. Plants were inoculated by standard methods. Five of the 6 tobacco plants treated with the CMV-positive inoculum tested positive for CMV using ELISA. All control plants tested negative for the virus. Nomenclature: Dalmatian toadflax, Linaria dalmatica (L.) Mill. LINDA; tobacco, Nicotiana tabacum L.; cucumber mosaic virus.

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    Citation

    Dinkins, Courtney L. Pariera; Brumfield, Sue K.; Peterson, Robert K. D.; Grey, William E.; Sing, Sharlene E. 2007. Dalmatian toadflax (Linaria dalmatica): New host for cucumber mosaic virus. Weed Technology. 21: 41-44.

    Keywords

    invasive species, risk assessment, CMV Fast New York strain, Agdia Immunostrip

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https://www.fs.usda.gov/treesearch/pubs/39174