The olive tree, the tree and its fruit

The olive tree, the tree and its fruit.

 
Is genus of about 40 species. They are evergreen trees with leaves oval and shiny, whitish on the underside. It is a plant native to mainly the Mediterranean coast, with long-lasting body and abundant irregular bumps. wood is hard and tough, yellowish outwardly blackish towards the center. In the area grows ever temperature does not drop below -5 degrees Celsius.
The olive fruit is oval nucleus. Once cured, black-green in color and taste unpleasant. The harvest begins in November. The bitter taste is eliminated via a special process. They are hand pick from the tree when ripen well salted, oil stored in special containers and then eaten. Can be harvested before maturity, the treatment is different. The fruit contains olive oil that is why is so nutritious.
Disease is the main fruit fly, but attacked by other insects (pyrinotritis, rychitis). The fruit fly is destructive and the screen is very difficult. The varieties are (Kalamata, savory, voliotiki etc.) is determined by size or shape.
Very widespread is the wild olive (O. europaea) with smaller leaves and thorns having small fruits. Exploited by vaccination. The olives from ancient times is the symbol of peace, abundance and glory.
By pressing the fruit and produce an oily substance viscous oil, with yellow or greenish.