Guangdong tomato yellow curl begomovirus

Guangdong tomato yellow curl begomovirus (Begomovirus solanumflavusguangdongense) is a severe phytopathogen within the Geminiviridae family. This virus is transmitted primarily by the whitefly species Bemisia tabaci, which acquires the viral particles while feeding on infected plant phloem.

The primary hosts of this pathogen are members of the Solanaceae family. Tomato, eggplant, and pepper crops are particularly susceptible, though the virus frequently maintains its cycle within weed populations, which act as critical reservoirs for future infections in subsequent seasons.

Symptoms of the infection manifest as profound morphological changes. Infected plants typically exhibit leaf curling, yellowing (chlorosis), and severe stunting. The reduction in growth is caused by the virus interfering with hormonal signaling, ultimately leading to minimal fruit set and deformed produce.

Development and spread are dictated by the environmental suitability for whitefly reproduction. Warm, arid conditions facilitate the rapid proliferation of the insect vector, leading to exponential viral spread across fields. In greenhouses, the confined environment often results in rapid, total crop infection.

The economic impact is devastating, often resulting in complete yield failure in heavily infested areas. Management strategies focus on an integrated approach, including the use of virus-resistant varieties, aggressive whitefly control programs, and strict weed management to eliminate alternative hosts.

• Deployment of insect-proof netting in greenhouses.
• Regular field scouting for whitefly populations.
• Rogueing and disposal of infected symptomatic plants.
• Implementation of crop-free periods to break the viral cycle.
• Utilization of reflective mulches to deter whitefly activity.