Solanum pallidicontorsionis virus

Begomovirus solanumpallidicontorsionis is a destructive plant virus belonging to the Geminiviridae family. It is a significant pathogen that targets the vascular tissues of host plants, leading to systemic physiological disturbances and substantial yield losses in agricultural settings.

The host range primarily includes Solanaceae family members. Economic impact is most severe in tomato (Solanum lycopersicum), pepper (Capsicum annuum), and eggplant crops. Various weed species belonging to the Solanaceae family often serve as alternative hosts, acting as viral reservoirs during non-cropping seasons.

Symptoms typically manifest as severe leaf curling, twisting, and puckering, accompanied by chlorosis and stunted internode elongation. Infected plants display a bushy, stunted appearance and show reduced flower production or total fruit set failure. In severe cases, the entire plant structure becomes distorted, rendering the crop unmarketable.

The development and transmission of this disease are heavily dependent on the whitefly Bemisia tabaci. This insect vector acquires the virus from infected plants through phloem sap feeding. Following a brief latent period, the whitefly can transmit the virus to healthy plants. Warm, humid conditions favor both whitefly population explosion and rapid viral spread.

Management and prevention strategies focus on integrated pest management (IPM) practices. Key measures include:

• Rigorous control of the Bemisia tabaci population using systemic insecticides and biological agents.
• Elimination of weed hosts surrounding the fields to remove reservoirs.
• Usage of physical barriers, such as insect-proof netting in greenhouses.
• Planting of virus-resistant or tolerant crop varieties.
• Adherence to strict crop rotation and field sanitation protocols.