Auxiliary insects are true friends of the gardener. By feeding of crop pests, they fight with high efficiency insect pests of the garden and protect plants without any nuisance to the environment. Their use in the plant protection is an alternative to chemical treatments that destroy the balance of the ecosystem. The most famous of them is the Ladybird who loves the aphids which it feeds voraciously. But other organisms are also effective. The Lacewing, nematodes, or even the mite eliminate without soul, slugs, ants, to white, to gray, caterpillars, moths, tipulidae, codling moth in Apple, butterfly palmivore... and other parasites.