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 of stone fruit by causing acidity and deformities. The only way to manage the disease is to destroy all infected trees, which can cause significant economic losses. The disease symptoms were first seen in Bulgaria around 1916-1917, thus the name of "sharka" - from Bulgarian "шарка", meaning "pox". In 1933, the virus origin was described by Dimitar Atanasov. The disease developed in several European countries. The plum pox virus is a linear single stranded RNA virus. There are nine strains of plum pox virus: PPV-D, PPV-M, PPV-EA, PPV-C, PPV-Rec (Recombinant), PPV-W, PPV-T, PPV-CR, and PPV-An. PPV-M isolates are more aggressive