Begomovirus rhynchosiasinaloaense

Begomovirus rhynchosiasinaloaense is a viral plant pathogen belonging to the Geminiviridae family. As a typical member of the Begomovirus genus, it possesses a circular, single-stranded DNA genome. The virus is primarily transmitted by the whitefly Bemisia tabaci in a circulative, non-propagative manner, which means the insect acquires the virus after feeding on infected plant sap and can transmit it for the rest of its life cycle.

The host range of this virus includes various leguminous species, particularly those in the Rhynchosia genus, which act as primary reservoirs. However, the virus frequently spreads to neighboring agricultural crops, posing a significant threat to legume production and certain solanaceous crops. The ability of the virus to persist in wild vegetation allows it to survive between cropping seasons.

The disease manifestation is characterized by severe physiological stress. Symptoms often include interveinal chlorosis, leaf curling, crinkling, and significant stunted growth. Affected plants exhibit a bushy appearance due to shortened internodes, and the overall reduced photosynthetic activity leads to poor fruit development and yield loss.

The impact of Begomovirus rhynchosiasinaloaense on agricultural systems is substantial. Infections occurring early in the development phase can result in total crop failure. Beyond the direct loss of harvest, producers face increased production costs due to the necessity for intensive insecticidal applications to control the vector population and the potential need to abandon heavily infested fields.

Effective management and prevention strategies include the following steps:

• Implementing rigorous weed control programs to eliminate alternative viral hosts.
• Monitoring whitefly populations using yellow sticky traps and early intervention.
• Utilizing certified, virus-free seeds and planting material.
• Deploying reflective mulches to deter insect vectors from settling on crops.
• Establishing host-free periods to interrupt the viral disease cycle.