Tobacco streak virus (TSV)
 

Tobacco streak virus (TSV) is a virus of Bromoviridae family, subgroup I of Ilarvirus genus (figure 1). Several species of thrips (Thrips tabaci, Frankliniella spp.) transmit the virus. It is also transmitted with seed in case of several weeds such as Datura stramonium (figure 2), Chenopodium quinoa, Helilotus alba ...
 
 
- Symptoms
 
Necrotic rings and patterns on leaves are observed, often in connection with the veins. Young leaves are necrotic, folded and deformed. Brown discoloration of some veins is also observed.
 
 
- Characteristics 
 
The virus occurs worldwide, under natural or experimental conditions. It infects many hosts, such as cotton, tomatoes, asparagus, beans, soybeans, grapes, strawberries, ornamental plants ... It only infects tobacco weakly and rarely. Some methods to control TSWV can be also used against TSV, see Protection Methods of TSWV (tomato spotted wilt virus).