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
Fruit wine bottling. Plum liquor, also known as "plum wine", is popular in both Japan and Korea, and is also produced in China. In China, plum wine is called "meijiu" (梅酒). Plum wine is normally made with distilled liquor and soaked with plum. The alcohol level is higher than typical fruit wine, which is fermented with just fruits. In Taiwan, a popular post-World War II innovation based on Japanese-style plum liquor is "wumeijiu" (烏梅酒; smoked plum liquor), which is made by mixing "Prunus mume" liquor (梅酒 "méijǐu"), "Prunus salicina" liquor (李酒 "lǐjǐu"), and oolong tea liquor. Another similar drink is plum jerkum,