Tobacco Ringspot Virus (Nepovirus TRSV) in Pests not Known to Occur in North America

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Ringspots and the characteristic

Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org

Ringspots and the characteristic "oak leaf" pattern is evident on leaf.

The virus disease first appears as circular line patterns of yellow and brown tissue on young leaves. These line patterns may follow the leaf veins and form the outline of an oak leaf. Some of the plant tissue may die, resulting in a

R.J. Reynolds Tobacco Company , Bugwood.org

The virus disease first appears as circular line patterns of yellow and brown tissue on young leaves. These line patterns may follow the leaf veins and form the outline of an oak leaf. Some of the plant tissue may die, resulting in a "shot-hole" appearance. Symptom severity varies from a few ringspots to a dwarfed plant with numerous patterns and ragged leaves. Ringspot usually appears on scattered plants and causes little or no economic loss.

Tobacco ringspot has the most distinctive symptoms of the virus diseases. The name truly describes the disease because chlorotic or necrotic rings occur in the leaf. A concentric line pattern of chlorotic and necrotic tissue, often forming an

R.J. Reynolds Tobacco Company , Bugwood.org

Tobacco ringspot has the most distinctive symptoms of the virus diseases. The name truly describes the disease because chlorotic or necrotic rings occur in the leaf. A concentric line pattern of chlorotic and necrotic tissue, often forming an "oak leaf" pattern, is very common. The symptoms occasionally are confirmed to one side of the plant. The disease appears early in the season, usually with initial growth after transplanting. Most infected plants recover as new symptomless leaves develop. The virus is transmitted by nematodes. In the field, infected plants may appear alone or clustered. Ringspot may occur in the plant bed.

Tobacco Ringspot Virus (<em>Nepovirus TRSV</em>) symptoms on tobacco (<em>Nicotiana spp.</em>)

Department of Plant Pathology , North Carolina State University, Bugwood.org

Tobacco Ringspot Virus (Nepovirus TRSV) symptoms on tobacco (Nicotiana spp.)

Tobacco Ringspot Virus (<em>Nepovirus TRSV</em>) symptoms

Jeffrey W. Lotz, Florida Department of Agriculture and Consumer Services, Bugwood.org

Tobacco Ringspot Virus (Nepovirus TRSV) symptoms

Single TRSV-infected plant.

William C. Nesmith, University of Kentucky Research and Education Center, Bugwood.org

Single TRSV-infected plant.

Leaf on left with ringspots and small areas of

William C. Nesmith, University of Kentucky Research and Education Center, Bugwood.org

Leaf on left with ringspots and small areas of "oak leaf" symptom.

Ajuga reptans 'Bronze Beauty'

John Fisher, Ohio Department of Agriculture, Bugwood.org

Ajuga reptans 'Bronze Beauty'

Rubus spp. 'Arapaho' 

John Fisher, Ohio Department of Agriculture, Bugwood.org

Rubus spp. 'Arapaho' 

Rubus spp. 'Arapaho'

John Fisher, Ohio Department of Agriculture, Bugwood.org

Rubus spp. 'Arapaho'

Tobacco Ringspot Virus (<em>Nepovirus TRSV</em>) symptoms on eastern sweetshrub (<em>Calycanthus floridus</em>)

John Fisher, Ohio Department of Agriculture, Bugwood.org

Tobacco Ringspot Virus (Nepovirus TRSV) symptoms on eastern sweetshrub (Calycanthus floridus)

Tobacco Ringspot Virus (<em>Nepovirus TRSV</em>) symptoms on eastern sweetshrub (<em>Calycanthus floridus</em>)

John Fisher, Ohio Department of Agriculture, Bugwood.org

Tobacco Ringspot Virus (Nepovirus TRSV) symptoms on eastern sweetshrub (Calycanthus floridus)