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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Expanding Knowledge of the Host Range of Tomato chlorosis virus and Host Plant Preference of Bemisia tabaci MEAM1

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Author(s):
Farina, Arnaldo E. [1] ; Rezende, Jorge A. M. [1] ; Wintermantel, William M. [2]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Dept Fitopatol & Nematol, BR-13418900 Piracicaba, SP - Brazil
[2] USDA ARS, Salinas, CA - USA
Total Affiliations: 2
Document type: Journal article
Source: PLANT DISEASE; v. 103, n. 6, p. 1132-1137, JUN 2019.
Web of Science Citations: 4
Abstract

The crinivirus Tomato chlorosis virus (ToCV) is often found infecting tomato crops in Brazil, with variable incidence, but associated with prevalence of its primary vector, Bemisia tabaci MEAM I. ToCV control is difficult because there are no resistant commercial tomato varieties or hybrids available and chemical spray for control of the whitefly vector has not been effective. The present study evaluated the partial host range of a Brazilian isolate of ToCV and the preference of B. tabaci MEAM1 for oviposition on those species identified as susceptible to the virus. Subsequently, transmission tests were performed using plants of each ToCV host species as sources of inoculum to elucidate the epidemiological importance of nontomato sources of inoculum for infection of tomato. Among 80 species experimentally inoculated, 25 were susceptible, including 6 previously not known to be hosts (Jaltomata procumbens, Physalis pruinosa, Solanum aculeatissimum, S. viarum, Beta vulgaris var. cicla, and Chenopodium quinoa). Preference of white fly for oviposition and infection by ToCV under free-choice transmission tests varied among the susceptible species. When ToCV-infected tomato, eggplant, and C. quinoa were used separately as sources of inoculum for virus transmission to tomato plants, mean percentages of infected plants were 76.6, 3, and 0%, respectively. Average oviposition of Bemisia tabaci on these three hosts were 2.7, 10.6, and 0.0 eggs/cm(2), respectively. Additional studies will be necessary to evaluate the importance of ToCV host plants under field conditions and their efficiency as sources of inoculum for virus acquisition and transmission to tomato crops. (AU)

FAPESP's process: 12/51771-4 - Begomovirus and Crinivirus in Solanaceae: molecular epidemiology and management strategies
Grantee:Jorge Alberto Marques Rezende
Support Opportunities: Research Projects - Thematic Grants