A microbial pesticide which is safe for the environment, fast-acting and excellent in an insecticidal effect in case of spray treatment for eggs and larvae of a pest is required. The invention provides a method for controlling at least one pest selected from the group consisting of whiteflies, aphid, spider mites, thrips, rust mites, leaf miners, pyralidae, cabbage moths and longhorn beetles, with Lecanicillium muscarium strain V-5 (deposition number: FERM BP-11135); and a microbial pesticide comprising the strain.