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The key to biological control is to understand the life cycle of pests, parasites, and predators. After mating of females of whitefly, 200 to 400 eggs can be produced on the back of plant leaves. Their life cycle is very short, only 3 weeks to 4 weeks, spreads particularly rapidly in the greenhouse, and all stages of growth are completed on plants.
Whitefly is a cluster of adults and nymphs that sucks plant juice on the back of the leaves, causing yellow spots on the surface of the leaves, causing the leaves to fall off, twist or grow. At the same time, they absorb more juice than they can digest, and they will secrete a large amount of honeydew. These honeydew will cover the black coal germs on the plants. Black coal stains can block photosynthesis, which in turn inhibits plant growth, often leading to leaf loss.
A small parasitic peak, the larvae, has been successfully used for at least 50 years as a natural enemy insect controlling the greenhouse whitefly. The larvae kill the whitefly in two ways. The first is that the female ovulates into the nymph of the whitefly, and the hatched nymph eats the whitefly nymph and eventually kills the whitefly; the adult bee can also suck the body fluid of the nymph, causing the whitefly to die.
The female bee of the larvae can ovulate 400 in their lifetime. After the larva hatches, the larvae first absorb the insignificant tissues of the body, so that before the death of the whitefly, the larvae can grow to a sufficient size.
After being parasitized, the white cockroaches and nymphs turn black. Adult Lizard bees fly out of these black cockroaches and look for other white mites or nymphs to suck and ovulate.
In the greenhouse, it is best to use the scorpion bee once it is found. The cockroaches and adults of the whitefly on the back of the plant leaf can be found to determine the presence of whitefly. It is also possible to use a yellow sticky board to stick white mites to determine the density of the larvae in the greenhouse. After finding the whitefly, put the bee card near the developing whitefly nymph.
It should be noted that the bee and the insecticide cannot be used at the same time. The larvae are particularly sensitive to pesticide residues in the greenhouse.
The most practical way to control the greenhouse whitefly using the Lily wasp is to use it as an integral part of the integrated pest control measures. Based on biological and traditional control, it is regularly controlled and does not depend on pesticides. 
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Biological control of whitefly
Whitefly mites harm a variety of ornamental plants and vegetables, and is a sucking pest. One of the most serious hazards to plants is the greenhouse whitefly (Trialeurodes vaporariorum).
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