Black currant reversion virus. The black currant flower
buds on the left have normal pubescence or hairyness; buds on the
right are from a reversion virus infected plant. They are smooth and
do not have as much pubescence.
Photo courtesy of Vicky Knight and Tony Adams, HRI, East Malling.
This disease is not present in NORTH AMERICA. This disease causes economically significant damage by reducing yields of European black currant production.
See: Leaves have fewer jagged edges than normal - foliage symptoms of black currant reversion virus
See: Flowers have 10 sepals instead of the usual five - symptoms of the severe or 'Russian' strain of black currant reversion virus