ISHS Acta Horticulturae 431: Tospoviruses and Thrips of Floral and Vegetable Crops
CONTROL OF TOMATO SPOTTED WILT VIRUS IN TOMATOES IN SOUTH AFRICA |
| Authors: | G.J. Thompson, J.J.B. van Zijl |
| Abstract:
As early as 1905 a wilt disease of tobacco in South Africa was described. It was later shown to be induced by tomato spotted wilt virus (TSWV) and to be transmitted by Frankliniella schultzei and Thrips tabaci. Today it is particularly prevalent in the Western and Eastern Cape where TSWV can limit production of tomatoes at certain times of the year. Since the arrival of F. occidentalis in 1988, the incidence of TSWV has increased in other regions. A breeding program for resistance against TSWV in tomato began in the late 1960s. Resistance from Lycopersicum peruvianum has been incorporated into breeding lines of both fresh-market and processing tomatoes. In 1988, the first fresh-market tomato cultivar, Stevens, with resistance to TSWV was released. Following the release of this cultivar, strains of TSWV have been monitored in regions where it has been extensively planted. Two strains of TSWV have been isolated from infected Stevens plants. Current programs on resistance breeding, strain characterization, and epidemiology of TSWV and its vectors are discussed. | |
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