Common begomovirus

The common begomovirus, a member of the Geminiviridae family, is a significant plant pathogen characterized by a circular single-stranded DNA genome. These viruses are predominantly transmitted by the whitefly complex, specifically Bemisia tabaci, which acts as the primary vector in spreading the infection within agricultural ecosystems.

Host plants typically include a wide range of economically important crops such as tomatoes, peppers, eggplants, and various cucurbits. The virus causes systemic infections, leading to profound physiological changes in the host plant and affecting its ability to produce high-quality fruits, which represents a major challenge for modern vegetable farming.

Symptoms of begomovirus infection include leaf curling, yellow mosaic patterns, stunted growth, and distorted fruit development. In many cases, infected plants appear pale and exhibit reduced leaf size, which significantly limits photosynthetic activity and reduces the overall biomass and yield potential of the plant.

Disease development is heavily dependent on the population dynamics of whiteflies, which thrive in warm, humid conditions. The virus is capable of persisting in alternative weed hosts during off-seasons, ensuring its survival and rapid transmission to new crops as soon as favorable weather conditions arise for the vector population.

• Use of virus-free certified seeds and transplants.
• Rigorous integrated pest management (IPM) targeting whiteflies.
• Implementation of physical barriers like fine-mesh insect nets in greenhouses.
• Rotation of crops with non-host species to break the viral cycle.
• Removal and destruction of infected plants and symptomatic weeds.

Effective management requires a combination of strategies focusing on vector suppression and genetic resistance. Since there is no chemical cure for systemic viral infections, the focus remains on exclusion, sanitation, and early intervention to maintain plant health and prevent widespread economic loss in production areas.