NAPIS - Alfalfa Mosaic Virus

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The most distinguishing symptom of alfalfa mosaic virus is a bright yellow mosaic of the affected leaves, however, not all strains of the virus produce this symptom. Chlorotic line patterns similar to the symptoms of tobacco ringspot are common. Chlorotic blotches and vein clearing of expanding leaves are often present. The virus overwinters in legumes and is transmitted to tobacco by aphids. AMV is found infrequently in burley.

R.J. Reynolds Tobacco Company , Bugwood.org

The most distinguishing symptom of alfalfa mosaic virus is a bright yellow mosaic of the affected leaves, however, not all strains of the virus produce this symptom. Chlorotic line patterns similar to the symptoms of tobacco ringspot are common. Chlorotic blotches and vein clearing of expanding leaves are often present. The virus overwinters in legumes and is transmitted to tobacco by aphids. AMV is found infrequently in burley.

A potato leaf showing symptoms of Alfalfa Mosaic Virus (AMV) in the field.

Howard F. Schwartz, Colorado State University, Bugwood.org

A potato leaf showing symptoms of Alfalfa Mosaic Virus (AMV) in the field.

Characterized by chlorotic line patterns somewhat similar to the symptoms of tobacco ringspot virus, but with severe symptoms causing younger leaves to appear nearly white with puckering of tissue between the veins.

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

Characterized by chlorotic line patterns somewhat similar to the symptoms of tobacco ringspot virus, but with severe symptoms causing younger leaves to appear nearly white with puckering of tissue between the veins.

Characterized by chlorotic line patterns somewhat similar to the symptoms of tobacco ringspot virus, but with severe symptoms causing younger leaves to appear nearly white with puckering of tissue between the veins.

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

Characterized by chlorotic line patterns somewhat similar to the symptoms of tobacco ringspot virus, but with severe symptoms causing younger leaves to appear nearly white with puckering of tissue between the veins.

Characterized by chlorotic line patterns somewhat similar to the symptoms of tobacco ringspot virus, but with severe symptoms causing younger leaves to appear nearly white with puckering of tissue between the veins.

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

Characterized by chlorotic line patterns somewhat similar to the symptoms of tobacco ringspot virus, but with severe symptoms causing younger leaves to appear nearly white with puckering of tissue between the veins.

Alfalfa Mosaic Virus (<em>Alfamovirus AMV</em>) symptoms

Lesley Ingram, Bugwood.org

Alfalfa Mosaic Virus (Alfamovirus AMV) symptoms

Alfalfa Mosaic Virus (<em>Alfamovirus AMV</em>) symptoms

Lesley Ingram, Bugwood.org

Alfalfa Mosaic Virus (Alfamovirus AMV) symptoms

Alfalfa Mosaic Virus (<em>Alfamovirus AMV</em>) symptoms

Lesley Ingram, Bugwood.org

Alfalfa Mosaic Virus (Alfamovirus AMV) symptoms