Plum pox show no symptoms on leaves or fruit. Not all infection in "Prunus" are characterized by a ring symptom on leaves. Several cultivars show yellowing line patterns and blotches, or necrotic ring symptoms on expanded leaves. Leaf distortion has also been observed. Infected fruit can develop yellow rings or blotches, or brown rings, and some plum and apricot fruit can be severely deformed and bumpy. The seed of many infected apricots and some plums show rings. Many non-"Prunus" species, in at least nine plant families, have been infected artificially with one or more strains of the plum pox virus, and in
Date-plum when ripe, 1–2 cm in diameter. Seeds with thin skin and a very hard endosperm. Caucasian persimmon fruits are edible and contain lots of sugars, malic acid, and vitamins. They are used as fresh fruits or after frost, but usually dried. Drying and frost destroy their tartness. Date-plum Diospyros lotus, with common names date-plum, Caucasian persimmon, or lilac persimmon, is a widely cultivated species of the genus "Diospyros", native to subtropical southwest Asia and southeast Europe. Its English name derives from the small fruit, which have a taste reminiscent of both plums and dates. It is among the oldest plants