Solanum guangxiense begomovirus

Solanum guangxiense begomovirus (Begomovirus solanumguangxiense) is a viral pathogen of the Geminiviridae family. Like other viruses in this genus, it possesses a single-stranded DNA genome and relies entirely on insect vectors for its spread, making it a significant challenge for modern vegetable production in affected regions.

The virus is primarily transmitted by the silverleaf whitefly (Bemisia tabaci) in a persistent, circulative manner. Once the insect ingests the virus from an infected host, the pathogen migrates through the midgut into the hemolymph and eventually reaches the salivary glands, allowing for transmission to healthy plants for the remainder of the insect's life cycle.

The host range is primarily focused on members of the Solanaceae family. Tomatoes, peppers, and eggplants are particularly susceptible to this infection. Additionally, wild plant species surrounding agricultural fields often act as reservoir hosts, allowing the virus to persist during periods when the primary host crops are not present.

Visible symptoms often mimic physiological stress or nutritional deficiencies, which can complicate initial diagnosis. Typical signs include severe leaf curling, yellow mosaic patterns, leaf yellowing (chlorosis), and significant stunting. Plants infected at an early growth stage rarely produce marketable fruits, leading to heavy yield losses and reduced crop quality.

Management of the disease necessitates an integrated pest management (IPM) strategy, as there are no chemical agents capable of curing infected plants. Key measures include:

• Strict control of whitefly populations using targeted insecticides and biological control agents.
• Removal and destruction of infected plants to prevent further spread by whitefly vectors.
• Maintaining field hygiene by eliminating weeds that serve as alternative viral hosts.
• Utilization of physical barriers, such as insect-proof netting in greenhouses, to prevent whitefly ingress.