Tomato mosaic virus

Tomato mosaic virus (ToMV) is a highly infectious plant pathogen belonging to the Tobamovirus genus. Known for its remarkable stability, the virus can persist for years in soil, infected plant debris, and on contaminated tools, making it a persistent threat in both greenhouse and open-field cultivation systems.

The virus has an exceptionally wide host range. Beyond infecting tomato plants, it frequently attacks sweet pepper, celery, peanuts, and papaya. It also impacts various ornamental species, including Anemone coronaria (ветреница), Browallia speciosa (броваллия), Campanula carpatica (колокольчик), and the Slipper Flower (Pedilanthus).

Clinical symptoms include classic mosaic patterns of light and dark green mottling on leaves. Affected plants often exhibit severe stunting, leaf distortion, and crinkling. Fruit may develop irregular shapes, internal browning, or mottled skin, which significantly reduces the market value and yield of the produce.

Transmission of ToMV occurs primarily through mechanical contact. Contaminated pruning shears, handling by workers, or even physical contact between healthy and diseased plants can trigger an outbreak. Because the virus is highly stable, it can also persist on clothing and equipment, facilitating rapid spread across large areas during routine maintenance.

Management of ToMV is strictly preventative due to the lack of curative chemical treatments. Key strategies include:

• Utilizing certified disease-free seeds.
• Rigorous sanitation of tools using disinfectant solutions.
• Implementation of strict crop rotation and weed control.
• Early detection and roguing of symptomatic plants.