Begomovirus sidaureibracoense

Begomovirus sidaureibracoense is a viral plant pathogen belonging to the Geminiviridae family. It is a widespread agent in tropical and subtropical regions, known for its ability to cause severe mosaic and leaf curl symptoms in a variety of host plant species, particularly those within the Malvaceae family.

The host range of this virus is primarily associated with the genus Sida, which acts as a primary reservoir in nature. However, the virus has the potential to jump to other economically important crops. The biological nature of the virus, characterized by its circular single-stranded DNA genome, allows it to rapidly reprogram the host cell's machinery to favor viral replication.

Infected plants typically exhibit distinct phenotypic changes: interveinal chlorosis, mosaic patterning, leaf crinkling, and significant stunted growth. These physiological impairments drastically reduce the photosynthetic capacity of the plant, directly impacting the final yield quantity and the quality of the harvested produce.

The transmission mechanism of Begomovirus sidaureibracoense relies heavily on the whitefly Bemisia tabaci. This insect vector acquires the virus while feeding on phloem sap and transmits it to healthy plants. Environmental conditions such as high temperatures and drought facilitate the rapid proliferation of whitefly populations, leading to widespread infection outbreaks.

Effective management requires an integrated approach due to the lack of direct curative treatments for viral infections:

• Strict whitefly control using appropriate insecticides and biological agents.
• Removal of infected host weeds (like Sida species) from the vicinity of crop fields.
• Implementation of field sanitation and the use of virus-free planting stock.
• Deployment of physical barriers such as insect-proof netting in greenhouse environments.