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
California Cured Fruit Association California Cured Fruit Association The California Cured Fruit Association was formed by plum growers in the Santa Clara Valley, the country's largest center of production, in 1900 to handle distribution of the dried fruit. There were well over three thousand members, which included farmers in other parts of the state. The driving force in the association was its President Hiram Bond who with his brother Elmer Monroe Bond, a New York produce dealer, owned a plum nursery and bank in Santa Clara, California. There were wide swings in the price of prunes depending on time from the harvest. In 1901,