Solanum yellow leaf curl begomovirus

The causative agent of this disease is Begomovirus solanumflavuskanchanaburiense, a member of the Geminiviridae family. It is a single-stranded DNA virus that functions as a systemic pathogen. This virus is transmitted horizontally by insect vectors, primarily whiteflies, causing significant disruption to the physiological processes of the host plant.

The primary hosts for this virus are plants within the Solanaceae family. Crops such as tomatoes, peppers, and eggplants are particularly susceptible to this infection. Additionally, the virus often resides in various weed species, which serve as natural reservoirs throughout the growing season.

Symptoms of the infection typically include severe leaf curling, yellowing (chlorosis) of the leaflet margins, and stunted plant growth. The development of internodes is significantly reduced, resulting in a bushy, rosette-like appearance of the plant. Flowering is often inhibited, and fruit set is severely impaired, leading to substantial yield reductions.

The spread and development of the virus are strongly correlated with the population dynamics of its vector, the whitefly (Bemisia tabaci). Warm, dry environmental conditions accelerate the reproduction and migration of these vectors, facilitating rapid virus transmission across the field. High infestation rates are often linked to seasonal climate spikes.

The impact of this virus on agriculture is severe, often resulting in complete crop loss in untreated areas. Effective management involves integrated pest management (IPM) strategies:

• Stringent whitefly control programs using systemic and contact insecticides.
• Cultivation of virus-resistant tomato and pepper hybrids.
• Regular removal and destruction of symptomatic weeds in the vicinity of crops.
• Use of insect-proof netting in greenhouse and nursery environments.
• Implementation of appropriate crop rotation and fallow periods to break the infection cycle.