Black raspberry necrosis virus (BRNV) is a plant pathogen virus of the genus Sadwavirus found in black raspberries (rubus occidentalis). The virus causes leaf chlorosis, mottling and puckering. Affected plants typically fail to yield fruits after three to four years. References External links ICTVdB - The Universal Virus Database: Black raspberry necrosis virus Family Groups - The Baltimore Method Secoviridae Viral plant pathogens and diseases Raspberry diseases