A study to evaluate the efficacy of an insect growth regulator (IGR) pyriproxyfen against Anopheles aconitus larvae was conducted in Institute of Vector and Reservoir Control Research and Development laboratory Salatiga at July 2005. The research used 7 dozes of IGR, that were doze 0.1 ; 0.05 ; 0.01 ; 0.008 ; 0.005 and 0.003 ppm, as well as control treatment. Each doze used 4 replicates. The re…