Miscanthus mastrevirus

Miscanthus mastrevirus is a viral pathogen classified within the Mastrevirus genus of the Geminiviridae family. As a single-stranded DNA virus, it poses a significant threat to various grass species (Poaceae), affecting both agricultural crops and ornamental varieties through systemic infection.

The primary hosts for this virus include various species of Miscanthus and sugarcane. These plants act as both primary targets and reservoirs for the pathogen, allowing the virus to persist in agricultural landscapes and spread to neighboring fields if conditions are suitable.

The disease manifests primarily through leaf symptoms, including distinct chlorotic striping or streaking along the leaf veins. In severe cases, infected plants exhibit stunted growth, reduced leaf size, and overall loss of vigor, which directly leads to diminished yields and reduced plant longevity.

Transmission of the virus occurs primarily through insect vectors, specifically leafhoppers (Cicadellidae). These insects acquire the virus by feeding on infected plant tissues and subsequently transmit it to healthy plants. The severity and rate of infection depend heavily on the vector population density and environmental factors that favor insect activity.

Management and prevention of Miscanthus mastrevirus rely on an integrated pest management approach:

• Selection of healthy, virus-tested planting material for new fields.
• Strict weed control to eliminate alternative hosts for the virus.
• Implementation of regular scouting to detect infected individuals and remove them promptly.
• Application of targeted insecticides to manage leafhopper populations during high-risk periods.