The copepod Macrocyclops albidus is an unusually promising new form of biological control for mosquito larvae. When introduced to two isolated tire piles, M. albidus eliminated all Aedes albopictus larvae from both piles within 2 months. Adult Ae. albopictus around the tire piles disappeared within another month. Complete suppression of Ae. albopictus larvae was still in effect in all treated tires a year later.