The natural enemies against white fly

White flies are very dangerous pests of horticultural crops grown in protected areas in Macedonia. Because of the direct damage to the suction the juices from the leaves of plants, indirect damage to the secretion of honeydew that has contaminated fruits and leaves of infected plants and transmission of viral disease that can cause severe damage to cultivated plants. The large number of generations (can have up to 12 generations per year), the hidden way of life, the ability to rapidly acquire resistance to chemicals on the one hand and consumer demand for fresh produce uncontaminated by pesticides prompted manufacturers in developed countries to start using natural enemies of white flies to control their population in greenhouses and plastic tunnels.
The natural enemies of the white fly can be their parasites, predators or diseases. Often used parasites parasitic bees Encarsia formosa, Erotmocerus eremicus and E. mundus. Adults bees are killing the larvae of white flies for their own food, and most of them lay eggs that develop new parasitic bees that during its development are killing the larva of white flies. In this way a parasitic bees, directly or indirectly, kill from 100 to 150 larvae of the white fly.
Predators, usually larger than white flies and are using them for food because they need a larger number of individual white files. In greenhouses and plastic tunnels to fight against white flies are used more predators. Macrolophus caliginosus predatory during a day can eat 30 to 40 eggs, larvae 15 to 20 or 3 to 5 adult white flies. Family of bumble bees (Coccinellidae) are commonly used when certain places in the greenhouse white flies are reaching number that parasitic bees can not control them (500 and more white flies per m2). This predator can eat 150 to 700 eggs per day or more than 10 000 eggs or 700 larvae during their living period. Very good results gives predator spiders Amplyseius Swirskii which can eat up to 19 eggs or 15 larvae white flies per day from the first stage.
Enemies that are controlling the population of white flies in greenhouses and plastic tunnels, protect workers and consumers from the negative effects of pesticides, avoiding phenomena of phyto toxicity of plants and increasing yields of vegetable crops, easy introduction without the use of expensive machinery, after entering the natural enemies are seeking and killing harmful insects, natural enemies are living creatures that are multiplying causing control of the population of harmful insects throughout the vegetation.