Plum tomato include Roma VF and San Marzano (semi-determinate; a signature tomato of Italian cuisine), though there are many other varieties, such as the short-season Ropreco Paste and the larger Amish Paste and Big Mama. Five hybrid cultivars grown in California constitute over 60% of total production of processing tomatoes. Small plum tomatoes (similar in size to cherry tomatoes) are known as grape tomatoes. Plum tomato A plum tomato, also known as a processing tomato or paste tomato, is a type of tomato bred for sauce and packing purposes. They are generally oval or cylindrical in shape, with significantly fewer locules (seed
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