Tomato Mosaic Virus — Tomato

Symptoms

Symptoms may occur at any growth stage, and all parts of the plant may be affected. Leaves typically exhibit light- or dark-green mottling or mosaic patterns, accompanied by distortion of younger leaves. Plant stunting varies in severity. Severely affected leaves may develop a characteristic fern-like appearance with raised, dark-green areas. Fruit set may be greatly reduced. Green or ripe fruits may develop internal browning of the fruit wall, yellow blotches and necrotic spots. Depending on the virus strain, leaves, petioles, stems or fruits may develop yellow mottling or dark, necrotic streaks. Symptoms vary with the tomato variety, plant age at infection, environmental conditions and virus strain. Dual infection with Potato virus X (PVX) may cause severe symptoms known as double virus streak.