The tomato, Lycopersicon lycopersici, is the number one vegetable crop in terms of popularity and market value. This unique vegetable is a member of the Solanaceae Family and it is a native of Central and South America. Tomatoes are grown for two main purposes, one for the processing market and second for the fresh market in different types like: Red round tomato, Roma tomato, Plum tomato, Cherry tomato, Grape tomato, tomatoes on the Vine.
In the past all the tomatoes were grown in the open field but after that the insect Whitefly (Bemisia tabaci) started to attack the tomatoes plants and to transmit virus TYLCV to the plants that cause to decrees the production dramatically. Growers started to grow tomatoes in net houses covered by Anti Virus Net 50 mesh. This way of growing becomes to be very common in Israel, Mexico, Spain and worldwide. In summer time there are growers that grow under Anti Virus Net 50 mesh and ad shade net with 30% shade to decrease the temperature in day time. More shade than that can decrees yield.
The optimum temperature for growing tomatoes is 24°C during the day and during the night is 15°C, The optimum humidity percentage is 75% and the optimum amount of light is 1,400 µE.