A microencapsulated insecticide-treated fabric and a method for treating the fabric with a composition comprising at least one microencapsulated insecticide and at least one polymeric binder are provided. The coated or partially coated fabric maintains a sufficient amount of microencapsulated insecticide on the fabric surface to kill or repel insects, particularly mosquitoes, even after repeated washings. The fabric can be made into a net, clothing, and the like, for protection against insect-transmitted diseases such as malaria. A fabric treatment composition containing a suitable amount of at least one microencapsulated insecticide and at least one polymeric binder is also provided.