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Host range and whitefly transmission efficiency of Tomato severe rugose virus and Tomato golden vein virus in tomato plants

Host range and whitefly transmission efficiency of Tomato severe rugose virus and Tomato golden vein virus in tomato plants

Tropical Plant Pathology 40(6): 405-409

Begomoviruses are the most important viruses affecting tomato (Solanum lycopersicum) crops in Brazil. Tomato severe rugose virus (ToSRV) is the most predominant species, followed by Tomato golden vein virus (TGVV). We evaluated the putative effect of host range and whitefly transmission efficiency on the predominance of ToSRV. Whitefly (Bemisia tabaci, B biotype or MEAM 1) vectors carrying the two viruses were allowed to freely inoculate plants of 27 species, maintained in cages. Visual and PCR detection indicated that ToSRV could infect five plant species and TGVV could infect six species. Transmission studies were performed in single or double infections in tomato plants. ToSRV infected a higher percentage of plants than TGVV (single or mixed inoculation) in all trials. The rates of acquisition of ToSRV and TGVV, however, did not differ significantly between insects fed on tomato leaves with single or mixed infections. A higher transmission efficiency of ToSRV by whiteflies under the agricultural conditions of tomato cultivation in Brazil may thus contribute to the predominance of ToSRV in the field.

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Accession: 066306346

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DOI: 10.1007/s40858-015-0055-3

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