Sorghum mosaic virus

Sorghum mosaic virus (Sobemovirus snmov) is a significant plant pathogen that primarily affects sorghum and other related grass species. As a member of the Sobemovirus genus, this virus is characterized by a positive-sense single-stranded RNA genome, which enables it to replicate rapidly within host cells and initiate a systemic infection throughout the plant.

The host range of this virus includes various cereal crops, which are vital for agricultural productivity. Once the virus infiltrates the plant tissue, it disrupts vital physiological processes such as photosynthesis and chlorophyll synthesis, leading to a general decline in the overall vigor and growth rate of the crop.

Clinical symptoms of the infection often include mosaic patterns on the leaves, characterized by alternating light and dark green areas. As the disease progresses, plants may exhibit severe leaf deformation, stunted growth, chlorosis, and a notable decrease in grain quality and biomass production, which drastically affects commercial yields.

The virus is disseminated primarily through insect vectors, including aphids and leafhoppers, which transmit the pathogen during feeding. Environmental conditions favoring vector population growth, such as warm temperatures and moisture, often correlate with increased outbreaks of the mosaic disease in agricultural fields.

To mitigate the impact of the virus, growers must implement integrated pest and disease management strategies focused on prevention and vector control:

• Utilizing certified virus-free and resistant hybrid seed varieties.
• Managing weed populations in and around fields that act as secondary hosts.
• Implementing regular monitoring and strategic insecticide applications to control insect vectors.
• Applying crop rotation practices to reduce the carry-over of the virus in the soil environment.
• Sanitizing farming equipment to prevent mechanical transmission of the pathogen.