Sida golden mosaic virus

Begomovirus sidaureimaculae is a plant pathogen belonging to the genus Begomovirus, family Geminiviridae. This virus is characterized by its single-stranded circular DNA genome. As a systemic plant disease, it invades the phloem tissues, causing long-term physiological stress to the host organism.

The primary host range includes species of the genus Sida, specifically weeds common in tropical and subtropical agricultural regions. While it primarily affects Sida species, its presence serves as a reservoir for viruses that can occasionally jump to broader categories of malvaceous crops, affecting general agricultural health.

Symptoms of the infection manifest primarily as golden yellow mosaic patterns, chlorosis, and mottling on the leaves. Infected plants typically exhibit stunted growth and leaf distortion. The severity of these symptoms often depends on the age of the plant at the time of infection and the overall environmental stress levels.

The transmission of this virus is exclusively dependent on the whitefly Bemisia tabaci. The insect acts as a persistent vector, acquiring the virus during feeding and remaining infectious for a substantial duration of its life. Warm, humid conditions are ideal for the rapid expansion of whitefly populations, which in turn accelerates the spread of the virus across fields.

Control and management strategies focus on integrated pest management (IPM) to break the disease cycle:

• Application of systemic insecticides to reduce whitefly vector populations.
• Sanitation practices involving the removal of wild Sida hosts from field borders.
• Use of reflective mulches to deter insect landing on crops.
• Implementation of crop-free periods to interrupt the virus-vector cycle.