The larvae of the majority are primary parasitoids on Hemiptera, though other hosts are attacked, and details of the life history can be variable (e.g., some attack eggs, some attack larvae, others are hyperparasites, and some Encyrtidae develop as parasitoids of ticks). They are found throughout the world in virtually all habitats, and are extremely important as biological control agents.
Larvae of the majority are primary parasitoids on Hemiptera, though other hosts are attacked, and details of their life history can vary (e.g., some attack eggs, others attack larvae, some are hyperparasites, and some Encyrtidae develop as parasitoids of ticks). They are found worldwide in almost all habitats, and are extremely important as biological control agents.