Viruses are plant diseases caused by viruses that can have different origins: in fact the plant can be hit through small insect bites on its surface, or by scratches produced by animals. Even the man with his action can contribute to the infection: just a poorly executed pruning or contact with shoes, clothes, tools or even hands that have touched other infected plants. The most typical symptoms are wilting, the malformations of buds or buds or twigs, but above all the coloring of the leaves: the most recognizable virosis in fact are those that develop "mosaic", that is with discoloration of the leaves that have yellow spots that they can evolve into bubbles. Or darker colored stripes or circles may appear. Often there are also dark-colored streaks on the fruits which can sometimes take on a spongy and soft consistency. To fight virosis and prevent it from spreading, the infected specimens must be eliminated.