Tomato column surrounding the pistil's style. Flowers in domestic cultivars can be self-fertilizing. The flowers are across, yellow, with five pointed lobes on the corolla; they are borne in a cyme of three to 12 together. Tomato fruit is classified as a berry. As a true fruit, it develops from the ovary of the plant after fertilization, its flesh comprising the pericarp walls. The fruit contains hollow spaces full of seeds and moisture, called locular cavities. These vary, among cultivated species, according to type. Some smaller varieties have two cavities, globe-shaped varieties typically have three to five, beefsteak tomatoes have a
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