Havana Solanum mosaic virus

Havana Solanum mosaic virus (Begomovirus solanumhavanaense) is a viral pathogen classified within the genus Begomovirus of the Geminiviridae family. It is a DNA virus known for causing severe systemic diseases that disrupt the normal physiological development of agricultural crops.

The host range of this virus primarily includes members of the Solanaceae family, such as tomatoes, eggplants, and various wild nightshades. Economic damage is particularly significant when young plants are infected, leading to substantial yield losses and degradation of product quality.

Infected plants typically exhibit characteristic symptoms including mosaic patterns on the foliage, leaf curling, crinkling, and stunting. Because the virus interferes with growth hormones and nutrient transport, the overall plant architecture becomes distorted, and fruit formation is either significantly reduced or completely inhibited.

The transmission of this virus is primarily mediated by the whitefly (Bemisia tabaci) in a persistent-circulative manner. The insect acquires the virus during feeding and remains a carrier throughout its life cycle. Additionally, mechanical transmission via contaminated gardening tools can occur in greenhouse environments.

Management of Havana Solanum mosaic virus relies on integrated pest management (IPM) strategies due to the lack of curative chemical treatments:

• Strict vector control programs targeting Bemisia tabaci.
• Utilization of virus-indexed, healthy seedlings.
• Implementation of greenhouse screening and sanitation protocols.
• Removal and destruction of symptomatic plants and reservoir weed hosts.
• Monitoring for early disease signs to prevent rapid secondary spread.