Sugarcane mastrevirus

Mastrevirus saccharumpallidi is a viral pathogen belonging to the genus Mastrevirus, known to infect various grass species. As a member of the Geminiviridae family, it utilizes a single-stranded circular DNA genome. This virus is a specialized parasite that forces the host plant cells to replicate its genetic material, disrupting normal plant development and leading to economic losses in agricultural settings.

The primary host for this pathogen is sugarcane. However, the virus can also colonize various wild grasses which serve as ecological reservoirs. These reservoir hosts are critical for the virus's survival during the off-season, allowing it to persist in the environment and re-infect commercial plantations when conditions for insect vectors become favorable.

The symptoms of the disease are characterized by leaf mosaic patterns, yellow striping, and general plant stunting. Infected plants often show signs of diminished photosynthetic efficiency and deformed stalks. This physiological stress results in reduced sugar accumulation, which directly impacts the industrial quality and yield of the harvested crop.

Disease spread is strictly dependent on insect vectors, primarily leafhoppers (Cicadellidae). The virus is transmitted in a persistent manner, meaning the vector remains infectious for a significant portion of its life after feeding on an infected source. High temperatures and humidity accelerate both the life cycle of the leafhoppers and the systemic spread of the virus within the field.

To mitigate the impact of the disease, farmers must implement robust management practices:

• Monitoring and managing leafhopper populations through targeted insecticide application;
• Eliminating wild grass hosts near cultivation areas;
• Using certified, virus-free planting material;
• Implementing cultural practices that reduce insect vector habitats.