Woodiness of passion fruit

Woodiness of passion fruit, caused by the Cowpea aphid-borne mosaic virus (CABMV), is a devastating viral disease affecting Passiflora L. species worldwide. This disease significantly compromises the quality of fruit and the overall vitality of the vine.

The causal agent, CABMV, belongs to the Potyvirus genus. The virus is primarily transmitted by aphids, such as Aphis gossypii, which acquire the pathogen from infected plants and introduce it into healthy ones during feeding. Additionally, it can be spread mechanically via contaminated pruning tools during routine garden maintenance.

Symptoms of the infection are distinct: the most noticeable are the woody, distorted, and hardened fruits that become small and unmarketable. Foliage symptoms include mosaic patterns, chlorosis, and leaf deformation. As the virus progresses, the plant exhibits stunted growth, reducing its photosynthetic efficiency.

The spread of the disease is heavily dependent on the presence of insect vectors and the availability of inoculum sources. Warm environmental conditions facilitate higher aphid population densities, significantly increasing the rate of secondary infection across a field or home garden throughout the growing season.

The economic impact of woodiness disease is substantial, as infected vines produce non-consumable fruit, leading to total yield loss in severe cases. Since there is no curative treatment for viral infections in plants, management focuses on exclusion and sanitation to prevent the establishment and spread of the disease.

• Procure disease-free, certified planting material from reputable sources.
• Implement rigorous aphid management programs using appropriate insecticides.
• Remove and destroy all infected plants immediately upon symptom detection.
• Disinfect all pruning tools with a bleach solution between every plant.
• Maintain weed-free surroundings to eliminate potential alternative hosts.