Patent ID: 8263099

Claim:
A method for controlling an insect pest comprising scattering an effective amount of an insect growth regulating composition directly to an insect pest or to a place where an insect pest inhabits, wherein the insect growth regulating composition is a microencapsulated insect growth regulating composition, which comprises an insect growth regulating active ingredient encapsulated in a wall formed of polyurethane, having an average particle diameter of 1 to 40 μm, a wall thickness of 0.005 to 0.5 μm, and a ratio of a wall thickness/an average particle diameter of 0.0003 to 0.003, wherein a volume ratio of microencapsulated particles having a particle diameter of not less than 50 μm is not more than 20% by volume based on a total volume of microencapsulated particles, and wherein the insect pest is one in agricultural fields.