Causes direct and indirect damage to various plants. Direct damage; it extends from absorption of plant sap to leaf damage. Even more serious indirect damage is to learn from the fact that some insects, production declines, viruses that cause defects and rot until the plant dies. Insects that most affect plants (especially tomatoes); Tuta (absoluta) trialeurodes vaporariorum is commonly known as “White Fly”. It carries generic vures. Transmission of Bemisia Tabaci and Frankliniella occidentalis, Tomato Spotted Wilt Virus (TSWV) and Tomato Yellow Leaf Curl Virus (TYLCVA). Chemical and Microbiological control tools are undoubtedly effective in their power to control insects, but before they are killed by the drug used in greenhouses, the insects penetrate the plants and transmit the virus. A physical barrier is now used to prevent insects from entering greenhouses. This is a Net weaving of the size of the eyes that changes according to the insect being protected. This type of protection is widely used all over the world, it prevents the entry of pests that carry viruses and keeps greenhouse pesticides inside to control other pests.