Potato yellow vein

Potato yellow vein is a destructive viral disease caused by the Potato yellow vein virus (PYVV), which primarily targets the vascular system of the host plant. This virus belongs to the genus Crinivirus and induces severe chlorosis, significantly hindering the physiological development and vitality of potato crops across various geographical regions.

The virus is host-specific to Solanaceae plants, impacting potatoes, tomatoes, and other related weed species. The infection is systemic, meaning the pathogen moves throughout the entire plant, affecting both the foliage and the underground tubers, which leads to reduced yields and inferior quality of the produce.

Characteristic symptoms appear as a bright yellow discoloration of the leaf veins, which eventually spreads across the entire leaf blade. Infected plants often exhibit stunted growth, shortened internodes, and a bushy appearance. In severe cases, the foliage may curl or become crinkled, and tuber production is significantly inhibited.

Transmission of the disease is facilitated primarily by the greenhouse whitefly, Trialeurodes vaporariorum. The whitefly acquires the virus from infected plants and spreads it during feeding. Environmental factors such as warm, humid conditions favor whitefly proliferation, making it easier for the virus to spread rapidly throughout an entire field during the growing season.

Managing this disease requires an integrated approach focusing on prevention and vector control. It is essential to use certified virus-free seed potatoes and implement a rigorous monitoring program to detect whitefly populations early. Applying appropriate insecticides and removing infected plants immediately are critical steps in preventing the establishment and spread of the virus.

• Planting certified virus-free seed tubers.
• Implementing strict vector control against whiteflies.
• Removing and destroying symptomatic plants.
• Controlling wild Solanaceae weeds near fields.