ARTIFICIAL INFECTION OF ORNAMENTALS WITH TOMATO SPOTTED WILT VIRUS (TSWV) AND THE OCCURRENCE OF TSWV IN RHINELAND-PALATINATE

With the widespread occurrence of the main TSWV-vector Frankliniella occidentalis (Pergande), TSWV has become a growing threat to horticultural crops in Europe in the last few years.
In Rhineland-Palatinate (Germany), TSWV was found in crops such as Chrysanthemum–Indicum hybrids, Bellis perennis, Columnea hybrids and Pelargonium-Peltatum hybrids.

However, with the development of different polyclonal and monoclonal antibodies, it has become possible to improve the serological diagnosis and to divide the various isolates of TSWV in serogroups and serotypes.

The symptomatology of SA-05, a member of serogroup II, was poorly characterized.
Therefore, attempts were made to infect ornamentals with SA-05 and BR-01 in particular by means of mechanical inoculation.
New-Guinea-Impatiens appear to be very sensitive to TSWV SA-05, whereas chrysanthemums and pelargoniums showed only weak reactions upon infection with BR-01, a member of serogroup I.

Due to the lack of information in regard to the distribution of TSWV in Rhineland-Palatinate, 38 nurseries were indexed for the occurrence of TSWV. The virus was found in crops such as tomato, New Guinea Impatiens, Sinningia hybrids and Lysimachia congestiflora.

VIII International Symposium on Virus Diseases of Ornamental Plants

A. Feldhoff, G. Krczal

https://doi.org/10.17660/ActaHortic.1994.377.14