Lamium mosaic virus

Lamium mosaic virus (Fabavirus lamii) is a significant viral pathogen within the Fabavirus genus, belonging to the Secoviridae family. The virus is recognized for its ability to cause systemic infections in various host plants, significantly impacting plant health and physiological processes by disrupting normal metabolic activities.

The virus primarily targets species within the Lamiaceae family, although its host range can extend to other agricultural and horticultural crops. Wild flora serves as a critical reservoir for the virus, allowing it to survive through the winter and initiate infection cycles in spring when vector populations become active.

Symptoms of Fabavirus lamii infection include typical mosaic patterns on the foliage, characterized by chlorotic mottling, spotting, or ring patterns. In severely infected plants, one might observe leaf curling, stunted growth, and reduced internode length. These symptoms often lead to a reduction in the plant's photosynthetic efficiency and overall vigor.

The transmission of this virus is primarily mediated by insect vectors, most notably aphids, which acquire the virus while feeding on infected plant tissues and subsequently transmit it to healthy hosts. Mechanical transmission can also occur under specific conditions, particularly in greenhouse or nursery settings where handling is frequent.

Managing Lamium mosaic virus requires a focus on vector control and phytosanitary measures. Since there are no direct chemical treatments for established viral infections, farmers should implement

• rigorous weed management to remove reservoirs,
• systematic insecticide applications to reduce vector numbers,
• strict hygiene protocols for field equipment,
• use of virus-free planting stock to ensure crop longevity.