Cucumber soil-borne virus

Cucumber soil-borne virus (CSBV) is a significant viral pathogen affecting crops in the Cucurbitaceae family. This disease is particularly problematic in greenhouse environments, as the virus persists in the soil and infects plants primarily through the root system, making it difficult to eradicate once it is established.

The disease is caused by a virus belonging to the Mirovirus genus. While cucumbers are the primary host, other cucurbits can also be affected. The virus can persist in soil organic matter and root debris, allowing it to survive between growing seasons and re-infect subsequent plantings if proper sanitation is not maintained.

Typical symptoms of infection include mosaic patterns on leaves, leaf distortion, and severe stunting of the plant. As the virus progresses, the internodes become shorter, and the plant's overall development is significantly retarded. Affected fruits often exhibit poor development, which severely impacts marketability.

The development of the disease is highly favored by high soil moisture levels and stable temperatures within the greenhouse. The virus spreads mechanically when root systems are damaged during agricultural practices, such as transplanting, weeding, or routine maintenance, allowing the pathogen to move from infested soil or nearby infected plants.

Management and prevention strategies focus on limiting the transmission of the virus and soil sterilization:

• Steam sterilization or chemical treatment of the growing media.
• Selection of virus-resistant cucumber varieties.
• Rigorous sanitation practices for tools and greenhouse equipment.
• Prompt removal and disposal of infected plants, including the entire root ball.
• Implementing strict crop rotation protocols.