Pepper mosaic (Peruvian tomato mosaic)

Pathogen and disease type. Pepper mosaic, caused by the Peruvian tomato mosaic virus (PeTMV), is a viral disease primarily affecting plants in the Solanaceae family. This pathogen is highly contagious and spreads through mechanical contact and via insect vectors, significantly impacting both yield quality and quantity.

Host plants. The virus primarily infects sweet pepper (Sweet Pepper) and tomato crops. It is known to cause severe outbreaks in both greenhouse conditions and open field cultivation, threatening the economic stability of vegetable production systems.

Symptoms and signs. Infected plants typically exhibit classic mosaic patterns on the foliage, characterized by alternating patches of light and dark green. Affected leaves may curl, distort, or show stunted development. Fruit may also show spots, discoloration, or deformities, rendering them unsuitable for market sale.

Development and severity. The spread of the virus is often correlated with the population dynamics of insect vectors, particularly aphids, which transmit the pathogen while feeding. The disease's severity lies in the rapid systemic infection of the crop, leading to metabolic disturbance and substantial reduction in total production value.

Protection and prevention measures. Controlling the virus requires an integrated management strategy. Key practices include the use of virus-free planting stock, strict control of aphid populations through timely insecticide application, and the removal of alternative weed hosts from the crop vicinity. Maintaining hygiene is crucial for preventing mechanical transmission during daily agricultural tasks.

• Planting resistant pepper cultivars.
• Effective insect vector management.
• Strict sanitation protocols for farm equipment.
• Timely rogueing of infected individual plants.