African eggplant mosaic virus

The African eggplant-associated mosaic virus is a pathogenic viral infection affecting various Solanaceous crops. It is typically caused by members of the Potyviridae family, which disrupt the physiological processes of the host plant, leading to significant physiological stress and reduced overall plant vitality.

The primary hosts of this virus include the African eggplant (Solanum aethiopicum), common eggplant (Solanum melongena), peppers, and tomatoes. The virus often persists in perennial weeds within or near the field, which serve as reservoirs throughout the year until conditions become favorable for transmission.

Symptoms of the infection typically present as mottled leaves with a characteristic mosaic pattern of light and dark green patches. Advanced stages of the disease may cause leaf curling, stunt plant growth, and lead to poor flower and fruit set. Plants infected at an early stage often fail to reach full maturity.

Transmission occurs primarily through aphid vectors in a non-persistent manner, meaning the insect can transmit the virus shortly after feeding on an infected plant. Mechanical transmission through pruning tools, farm machinery, and human handling also plays a crucial role in spreading the virus across larger field areas.

The economic impact is primarily seen in the drastic reduction of yield and market quality. Since no chemical treatments can cure a viral infection, control strategies must be proactive. Integrating biological and mechanical measures is essential to minimize the spread and sustain profitable agricultural production.

• Rogueing and destroying symptomatic plants immediately.
• Managing aphid populations with effective insecticide programs.
• Practicing strict hygiene during pruning and harvesting.
• Implementing weed management to eliminate alternative hosts.
• Selecting resistant or tolerant cultivars for high-risk areas.