This is probably the most well-known and widespread virus disease of blueberry. Originally described in New Jersey, it is now found in several locations in North America. It has not been reported from other parts of the world. Ripe berries are reddish rather than blue, causing an additional loss of quality. The streaks are most often found on the side of the stems exposed to the sun.
Leaves are often narrow and elongated, with wavy edges.
They may also be somewhat sickle shaped. Many leaves on the bush may be affected, or just a few near the crown. The berries ripen prematurely, and are often reddish purple rather than blue. After a few years, berry production drops dramatically. Very few of these aphids are winged, so they usually move from one plant to the next by crawling along touching branches.