Potato tepovirus T

Potato tepovirus T (Tepovirus tafsolani) represents a serious viral threat to potato crops, characterized by its systemic impact on plant physiological processes. The pathogen is a virus that interferes with nutrient translocation and photosynthetic activity, leading to structural damage within the plant's vascular tissues and a significant reduction in tuber yield quality.

The host range of this virus primarily includes cultivated potatoes and various wild Solanaceae species. Being a systemic pathogen, the virus colonizes the entire plant, making all vegetative parts and developing tubers potential reservoirs for the infection. This biological characteristic necessitates a cautious approach to selecting planting stock.

Symptoms of the disease typically appear as mosaic patterns, chlorotic mottling of the leaves, and significant leaf deformation. Affected plants often exhibit stunted growth, reduced leaf size, and a general lack of vigor. These signs are often the first indicators of a viral infestation that can progress rapidly throughout the field if not identified and addressed immediately.

The transmission and spread of the virus occur through mechanical contact, contaminated farming tools, and insect vectors. Favorable environmental conditions, such as high humidity and optimal temperatures for vector development, significantly increase the rate of secondary infections within a crop, leading to clusters of diseased plants appearing across the field.

Effective management requires a combination of strict preventive measures to minimize economic damage. Key strategies include:

• Exclusive use of certified, virus-free seed potatoes.
• Rigorous sanitation protocols for farm machinery and manual tools to prevent mechanical transmission.
• Integrated pest management (IPM) to control insect vectors.
• Immediate roguing of infected plants to limit the spread of the virus.
• Implementation of spatial isolation between commercial and seed production fields.