Abstract
Symptoms of PVX are variable and depend on cultivar, virus strain, environmental conditions and synergism in mixed infections. Most isolates cause only mild leaf mosaic or symptomless infections, especially at higher temperatures. For example, a strain that in cv. Alpha causes interveinal mosaic when plants are grown below 22° C, remained symptomless in those grown above 22° C (Beemster and de Boxk, 1987). The yield reductions in such symptomless plants are generally less than 10%, even though they may contain high virus titers. These plants remain carriers of the virus and are important sources of infection. Other strains induce necrotic streaks, severe mosaic, crinkling and rugosity of leaves and may cause significant yield losses. In potato cultivars with genes Nx and Nb, some strains of PVX induce a hypersensitive severe top necrosis (Cockerham, 1955; Jones, 1985). In mixed infections with PVY, yields are reduced by up to 50%.
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© 2001 Springer Science+Business Media Dordrecht
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Loebenstein, G. (2001). Potato X Virus (PVX; Genus Potexvirus). In: Loebenstein, G., Berger, P.H., Brunt, A.A., Lawson, R.H. (eds) Virus and Virus-like Diseases of Potatoes and Production of Seed-Potatoes. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0842-6_8
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DOI: https://doi.org/10.1007/978-94-007-0842-6_8
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-3736-5
Online ISBN: 978-94-007-0842-6
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