Solanaceous host plants of tomato spotted wilt tospovirus
Tomato spotted wilt tospovirus (TSWV - EPPO A2 quarantine pest) has a very wide host range. Studies were carried out in France on the solanaceous hosts of the virus (natural and artificial hosts). A probably non-exhaustive list of solanaceous hosts established from the literature already gave 103 plant species names (from 20 genera, including natural and experimental hosts).
Natural infections observed in southern France
Tomato: In France, TSWV was first observed in tomato fields in 1933. The virus was not observed for a long period but reappeared in 1987. Since then serious outbreaks leading to crop destruction occurred in Côte d'Azur, Provence, Languedoc-Roussillon, as well as in the overseas island of Réunion.
Capsicum: Natural infections have been observed since 1989, especially in Alpes-Maritimes, Pyrénées-Orientales, Provence and Rhône-Alpes.
Aubergine: TSWV was not detected in aubergine until 1993, but serious outbreaks have since been reported from field crops in Provence and Pyrénées-Orientales.
Tobacco: So far, TSWV infections on tobacco are very limited in France.
Weeds: samples of solanaceous weeds were collected near infested fields and TWSV was detected in Solanum nigrum and S. dulcamara.
Artificial inoculation studies made with numerous species of the genera: Atropa, Datura, Capsicum, Hyoscyamus, Nicotiana, Petunia, Physalis, Saracha, Salpichroa, contributed to increase the list of solanaceous hosts of TSWV (from the 103 previously listed species to 148).
Gognalons, P.; Gebre-Selassie, K.; Marchoux, G. (1999) La gamme d'hôtes du TSWV continue à s'étendre.
Phytoma - La Défense des Végétaux, no. 512, 4751.