TOMATO SPOTTED WILT VIRUS: ECOLOGICAL ASPECTS IN ORNAMENTAL CROPS IN THE NETHERLANDS FROM 1989 UP TO 1991

A few years after the introduction of the western flower thrips, Frankliniella occidentalis, in the Netherlands, a revival of tomato spotted wilt virus (TSWV) was observed.
The virus was found in more than 60 plant species, including ornamentals, vegetables as well as weeds.
Within the group ornamentals it was detected most frequently in Chrysanthemum, Impatiens and Kalanchoe.

TSWV caused diseases in glasshouses mainly.
Whenever the disease occurred in the field, the particular plants were either raised in or grown adjacent to a glasshouse, where TSWV-infected plants were present.
Analysis of the relations that existed between different glasshouses where the virus occurred, revealed that both thripses, especially F. occidentalis, and trade of plant material were responsible for its spread.

Impatiens necrotic spot virus (INSV), which was considered previously to be a strain of TSWV, was found three times in Begonia. Indications exist that INSV has not established in the Netherlands, so far.
Until now, no clearly distinct variants of TSWV have been found in the Netherlands.

VIII International Symposium on Virus Diseases of Ornamental Plants

J.Th.J. Verhoeven, J.W. Roenhorst

https://doi.org/10.17660/ActaHortic.1994.377.18