Tomato spotted wilt virus on Thanksgiving cactus
The impatiens strain (TSWV-I) and the lettuce strain (TSWV-L) of tomato spotted wilt virus (EPPO A1 list) were detected on thanksgiving cactus (Schlumbergera truncata) in Pennsylvania (US).
TSWV was determined by ELISA on naturally infected S. truncata, which showed neither thrips nor thrips damage, originating from greenhouses of commercial propagators.
Further studies showed that artificially inoculated S. truncata developed no symptoms or only slight or uncharacteristic lesions. This makes it very difficult to detect TSWV on S. truncata, which could be of quarantine significance within the international trade of ornamental plants.
Hausbeck, M.K.; Gildow, F.E. (1991) Report of tomato spotted wilt virus on thanksgiving cactus.
Plant Disease 75, 215.