Is mantis a beneficial insect or a pest?

Mantis is a beneficial carnivore, while mantis is a land predator (carnivore). Mantis can prey on all small species of insects, especially eggs, larvae, naked pupae and adults of flies, mosquitoes, moths and butterflies. Biological control is a method to suppress pests by using their natural enemies, because pests themselves are the food of many insects and other animals, and also the hosts of many microorganisms. The reason why some pests can't survive in large numbers in old producing areas is sometimes not due to improper weather, insufficient food or insufficient reproduction, but the result of predation or parasitism by natural enemies, which leads to a large reduction in numbers. The natural enemies of pests, namely beneficial insects, can be easily divided into predatory or parasitic insects.