Potexvirus ecspotati

The causative agent of the disease is Potexvirus ecspotati, a member of the Potexvirus genus characterized by its single-stranded RNA genome. As a systemic plant pathogen, this virus induces physiological malfunctions, disrupting photosynthesis and nutrient transport within the host plant's tissues, eventually leading to stunted growth.

The primary hosts of this virus are members of the Solanaceae family, including tomatoes, peppers, and potatoes. Furthermore, various weed species can act as asymptomatic reservoirs, maintaining the viral population throughout the growing season and spreading it to adjacent cultivated crops through mechanical contact.

Typical symptoms include the development of chlorotic spots, mosaic patterns on foliage, and significant leaf distortion. Infected plants often exhibit reduced height and shortened internodes. In severe cases, necrotic lesions may appear on stems and leaves, while fruit quality is negatively impacted by mottling and size reduction.

Transmission occurs predominantly through mechanical means. The virus is easily spread via contaminated pruning tools, human contact during field operations, or direct contact between healthy and diseased plant foliage. Environmental factors such as high plant density facilitate rapid transmission, especially when combined with frequent handling of the plants.

• Strict sterilization of all cutting tools with disinfectant solutions.
• Prompt roguing and destruction of symptomatic plants.
• Effective weed control to eliminate potential viral reservoirs.
• Selection of resistant plant varieties or certified virus-free seeds.
• Training field personnel in hygiene practices to prevent cross-contamination.

The economic impact of the disease is substantial, resulting in significant yield losses and reduced marketability of produce. Because there are no effective chemical curative treatments for viral infections in plants, management focuses heavily on preventing the introduction and subsequent spread of the virus within the cropping system.