Prunus necrotic ringspot virus (PNRSV) is an RNA virus that belongs to the genus Ilarvirus, within the family Bromoviridae. This virus affects a variety of species of the Prunus genus, including the cherry tree. PNRSV is transmitted primarily through pollen and infected seeds, as well as contaminated grafts and tools. The virus can persist in infected plant material, such as buds and roots, and spreads rapidly under favorable conditions. Once the virus penetrates the host cell, it replicates using the cellular machinery, leading to the production of new viral particles that spread to other cells and tissues. Symptoms of infection may not appear immediately and may be influenced by environmental factors and host variety. As the infection progresses, the virus causes necrosis and ring Taches on the leaves, reducing the photosynthetic capacity of the plant and affecting its overall health.