HPIPM:Tobacco Streak Virus

Author: Howard F. Schwartz, David H. Gent, Gary D. Franc and Robert M. Harveson

Taxonomy

Domain	Viruses
Realm	Riboviria
Kingdom	Orthornavirae
Phylum	Kitrinoviricota
Class	Alsuviricetes
Order	Martellivirales
Family	Bromoviridae
Genus	Ilarvirus

Scientific Name

Ilarvirus TSV

Scientific Name Synonyms

Ilarvirus Strawberry Necrotic Shock Virus

Common Name

tobacco streak virus (TSV)

Identification and Life Cycle

Tobacco streak virus (TSV) or red node is vectored by two species of thrips. In addition to dry bean, other known hosts of the virus include white sweet clover, yellow sweet clover, asparagus and cowpea. The disease is of rare occurrence on the Central High Plains and seldom causes economic loss.

Plant Response and Damage

Red node infection causes a reddish discoloration of nodes at the point of attachment of leaf petioles to stems. In severe cases, infected plants will flex or break at a discolored node. Veins and veinlets of leaves exhibit a red to reddish-brown streaking. Red to reddish-brown concentric rings form on pods which become shriveled or puffy and do not produce seeds. Plants can be severely stunted and killed by the virus.

Biological Control

No biological control strategies have been developed for red node.

Cultural Control

Red node occurs so infrequently that cultural control strategies have not been developed. The planting of certified seed is advisable since the virus can be seed-borne. Some breeding lines appear more susceptible than others, but the reaction of most commercial varieties is unknown.

Chemical Control

Chemical controls have not been developed for red node. Thrips control is probably ineffective.

Due to constantly changing labels, laws and regulations, the sponsors of this web site assume no liability for the suggested use of any chemicals noted in the management section. Contact your local pest management personnel for current information on labeled pesticides that can be used for the intended plant disease, insect pest or weed.