Jatropha begomovirus

Jatropha begomovirus (Begomovirus jatrophae) is a viral plant pathogen belonging to the genus Begomovirus. This virus is a significant concern for the cultivation of Jatropha curcas, a plant widely recognized for its industrial importance in biofuel production across tropical and subtropical regions.

The host range of this virus is primarily restricted to Jatropha species within the Euphorbiaceae family. Once the plant is infected, the virus systematically colonizes its tissues, causing long-term physiological stress. It is a major limiting factor for successful industrial-scale farming of this energy crop.

Clinical symptoms of the infection include severe yellow mosaic patterns, leaf curling, crinkling, and significant reduction in leaf size. Infected plants often exhibit stunted growth and abnormal internode development. These visual signs are critical for field identification and monitoring of the disease progression.

The transmission of the virus is carried out by the whitefly Bemisia tabaci. The insect acquires the virus while feeding on infected plants and transmits it to healthy hosts during subsequent feeding cycles. Outbreaks are closely correlated with environmental factors that favor the proliferation of whitefly populations, such as high temperature and humidity.

The economic impact of the virus includes a drastic decline in seed yield and oil content, directly affecting the profitability of Jatropha plantations. Disease management strategies focus on integrated pest management (IPM) to control whitefly vectors, the implementation of strict sanitation procedures, and the utilization of virus-free planting materials.

• Application of systemic insecticides for whitefly control
• Rogueing of infected plants to minimize secondary spread
• Maintaining field hygiene by removing alternative weed hosts
• Breeding for viral resistance in Jatropha genotypes