Nucleorhabdovirus

Nucleorhabdovirus is a genus of plant-infecting viruses within the Rhabdoviridae family. Unlike its related genus Cytorhabdovirus, nucleorhabdoviruses are characterized by the fact that their replication and maturation processes occur primarily within the nucleus of the host plant cell.

These pathogens have a broad host range, affecting various economically significant crops such as potatoes, maize, and several cereal species. They cause systemic infections that spread throughout the entire plant, disrupting metabolic processes and physiological development from the early stages of growth.

Symptoms of nucleorhabdovirus infection typically include distinct leaf chlorosis, mosaic patterns, plant stunting, and the curling or twisting of leaves. In severe cases, the infected plants exhibit reduced vigor, poor root system development, and significant yield losses, as the virus interferes with essential nutrient transport.

The transmission of these viruses in agricultural ecosystems is almost exclusively mediated by insect vectors, primarily leafhoppers and aphids. The virus typically maintains a persistent circulative relationship with its vector, meaning that once a vector acquires the virus by feeding on an infected plant, it remains infectious for the remainder of its lifespan.

Effective management and prevention of nucleorhabdovirus focus on disrupting the disease cycle.

• Implementation of rigorous vector control using selective insecticides.
• Regular field monitoring to detect early symptoms and rogue infected plants.
• Control of volunteer crops and wild weeds that act as virus reservoirs.
• Use of virus-free certified planting material to prevent primary infection.
• Application of cultural practices that enhance crop health and resilience.