We evaluated larval and adult susceptibility to 5 insecticides commonly used for control ofAedes albopiazs, by using 15 field-collected populations from northem and central ltaly, and we comparedthese data, collected in 2002, with those from evaluations conducted in 1992-93, 1996, and 1998-99. Larvaewere tested for susceptibility to temephos and to the conventional diagnostic dosages of chlorpyrifos and fenthionproposed by the World Health Organization for Aedes aegypti. Adults were exposed to the diagnostic dosagesof deltamethrin and permethrin. Overall, all of the populations...