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Increase in biocontrol is the release of other natural enemies. Relatively few enemies natural can be released at a critical moment of the season (press inoculations) or, literally, millions may be released (press flood). Moreover, culture system can be modified to enhance or improve the natural enemies. This latter practice is often referred to as habitat manipulation. A report from the inoculated samples produced greenhouse production of several crops. Newspapers of the parasitoid, Encarsia formosa, are used to control the greenhouse whitefly, and predatory mites, Phytoseiulus persimilis, is used to control two spotted mites. Male beetles, lacewings, or parasitoids such as Trichogramma are frequently released in large amounts (provided that the floods). Discard the recommended rates for Trichogramma in vegetable or a vast field of 5,000 to 200,000 per hectare per week, depending on the level of infestation. Similarly, entomopathogenic nematodes are released at the expense of millions and even billions per acre for control of certain soil insect pests of housing. Habitat or environmental manipulation is another form of increase. This tactic is to change the culture system to increase or improve the effective natural enemy. Many adult parasitoids and predators benefit from sources of nectar and the protection provided by refuges such as hedgerows, cover crops, and the borders of weeds.

Mixed plantations and the supply of flowering borders can increase the diversity of habitats and provide shelter and other food sources. They are easily incorporated into home gardens, and even small-scale commercial plantations, but are more difficult to integrate into a production Large-scale cultivation. We also might conflict with pest control certain for the large producer because of the difficulty of target pests and use shelter pests and natural enemies. Examples of habitat manipulation include growing of flowering plants (pollen and nectar sources) near crops to attract and maintain populations of natural enemies. For example, adult syrphid umbelliferous may be attracted by flowering plants. Biological control experts in California have demonstrated that planting prune trees in the vineyards grape provides an improved overwintering habitat or refuge for a pest of grapes primary parasitoids. The port of deforestation in an intermediate host for parasitoid, which previously could only spend the winter at great distances from most vineyards. We must be careful with this tactic because some plants attractive to natural enemies may also be hosts for certain diseases of plants, including plant viruses that may be transmitted by insects in culture. Although the tactics seem encouraging, but a few have been sufficiently studied and developed.

Ladybugs, and in particular their larvae, that fires between May and July in the northern hemisphere, are voracious predators of aphids such as greenfly and blackfly, and will also consume mites, scale insects and caterpillars small. The ladybird beetle is very familiar with different color marks, while their larvae are initially small and spiders that grow from 17 mm long. The larvae have a black segmented body decreased gray / orange / yellow and marking of fierce mouthparts. They can encourage the cultivation of a plot of nettles in the garden and leaving hollow stems and some plant debris over the winter so they can hibernate. Syrphidae resemble slightly darker bees or wasps, and have characteristics floating, flying launching models. There are over 100 species of Syrphidae whose larvae feed primarily on aphids, one larva devouring up to fifty per day, or 1000, in his life. They also eat fruit tree mites and small caterpillars. Adults feed on nectar and pollen, which are necessary for egg production. The eggs are very small (1 mm), pale yellow, white and grew only near aphid colonies. Larvae are 8-17 mm long, disguised to look like to bird droppings, which are devoid legs and have a clear head. Semi-transparent in a palette of green, white, brown and black.

Hoverflies can be encouraged by planting flowers to attract as poached egg plant (Limnanthes douglasii), marigolds or Phacelia, through the growing season. Dragonflies are important predators of mosquitoes, both in the water, where the dragonfly naiads eat mosquito larvae, and in the air, where adult dragonflies catch and eat adult mosquitoes. The Community Adult aerosol wide control programs against mosquitoes also kill dragonflies, mosquitoes, removing one agent important biological control and can increase mosquito populations in the long term. Other useful garden predators include lacewings, pirate bugs, ground beetles and Rove, Midge lice, centipedes, predatory mites, as well as large animals such as frogs, toads, lizards, hedgehogs, slow worms and birds. Cats and rat terriers kill field mice, rats, insects and birds June. Hunting dogs of many types of pests. Dachshunds are high specifically to fit inside tunnels underground to kill badgers.

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