Jatropha nigeria begomovirus

Jatropha nigeria begomovirus (Begomovirus jatrophanigeriaense) is a viral pathogen belonging to the Geminiviridae family. It is a significant biological threat to Jatropha curcas, a plant cultivated globally for its potential in biodiesel production.

The virus acts as a systematic pathogen, spreading through the phloem of the host plant. It causes extensive disruption to the plant's metabolic pathways, resulting in stunted growth and drastically reduced yields of seeds and oil content, which are the primary agricultural outputs of this species.

Clinical manifestations include leaf mosaic, yellowing (chlorosis), leaf curling, and overall reduction in leaf size. In severe cases, the infected plants exhibit reduced flowering and poor fruit set, which leads to significant losses in plantation productivity.

Transmission occurs through the feeding activity of the whitefly Bemisia tabaci. This insect vector acquires the virus from infected plants and transmits it to healthy ones during feeding. Environmental conditions favoring whitefly population growth, such as stable high temperatures, significantly accelerate the spread of the disease.

Effective management and prevention strategies include:

• Rigorous control of whitefly populations using integrated pest management techniques.
• Implementation of field sanitation practices to eliminate alternative weed hosts of the virus.
• Use of virus-free, tissue-cultured plantlets to ensure the establishment of healthy plantations.
• Regular surveillance and immediate rogueing of symptomatic plants to reduce the inoculum load.