Lycianthes leaf curl begomovirus

The Lycianthes leaf curl begomovirus (Begomovirus lycianthesis) is a significant plant pathogen belonging to the Geminiviridae family. As a DNA virus, it infects host plants systemically, primarily colonizing phloem tissues and causing substantial disruption to plant physiological functions.

The virus has a specific affinity for plants within the Solanaceae family. It predominantly affects crops such as tomatoes, peppers, and various ornamental species, while also utilizing numerous common weeds as alternative hosts to survive during periods when primary crops are not present.

Clinical signs of infection typically include severe leaf curling, rugosity (wrinkling), chlorosis, and stunted growth patterns. Affected plants often exhibit reduced internode length, making them appear dwarfed, which inevitably leads to significant losses in both fruit yield and overall quality.

The primary vector responsible for the transmission of Begomovirus lycianthesis is the tobacco whitefly (Bemisia tabaci). Transmission is semi-persistent, meaning the whitefly can acquire the virus after feeding on an infected plant and remain infectious for an extended period, facilitating rapid viral spread throughout a field.

Managing this virus requires an integrated pest management (IPM) strategy focused on minimizing the vector population and eliminating viral reservoirs. Key measures include:

• Rigorous control of whitefly populations using targeted insecticides.
• Implementation of physical barriers like greenhouse insect-proof screening.
• Removal and destruction of infected symptomatic plants to reduce the local inoculum.
• Sanitation protocols, including the control of host weeds in and around cultivated areas.