In September 1991, the first breeding populations of Aedes albopictus were discovered in Veneto Region, Italy. Larvae were collected in a wide variety of peridomestic containers and in used tires. Attempts were made to eradicate this species from infested areas. No larvae or adults of Ae. albopictus were found from October 1991 onwards. It is not yet assessed if this was because of the control measures taken or due to the low fall temperatures and the short critical photoperiod prevailing in the area (L:D, 12:45). Since tire casings are believed to be the primary mode of introduction and dispersal of Ae. albopictus, an investigation of tire retreading operations was initiated to determine the source and mode of introduction of Ae. albopictus into Italy.