Croton yellow mosaic begomovirus

The disease is caused by Begomovirus crotoflavi, a member of the Geminiviridae family. As a viral pathogen, it interferes with plant metabolic processes and systemic development, leading to significant physiological stress within the host organism.

The primary host for this virus is the croton (Codiaeum variegatum). The virus typically infects plants within the Euphorbiaceae family, posing a substantial threat to commercial nurseries and botanical collections that specialize in ornamental tropical flora.

Symptomatic manifestation involves systemic chlorosis, resulting in distinct yellow mosaic patterns or mottled foliage. Affected plants frequently exhibit leaf distortion, stunted growth, and a notable loss of vigor, which renders them unsuitable for ornamental display or sale.

Transmission of the virus is primarily mediated by the tobacco whitefly (Bemisia tabaci). As a persistent vector, the whitefly acquires the virus while feeding on infected sap and transmits it to healthy plants, creating a cycle of infection that is difficult to break in greenhouse environments.

Management of Begomovirus crotoflavi relies entirely on rigorous preventive measures, as there are no chemical cures for plant viral infections. Key management strategies include:

• Sourcing virus-free propagation material from reputable suppliers.
• Implementing strict sanitation protocols to eliminate vectors.
• Rogueing and destroying symptomatic plants to reduce the reservoir of infection.
• Using integrated pest management (IPM) to control whitefly populations effectively.