One of the most used strategies for controlling Aedes aegypti is the use of the larvicide temephós (Abate). This larvicide has a prolonged residual effect which allows planning the focal treatments. This study aims to verify the duration of the larvicide residual effect stimulating a field situation. Plastic containers of one and five liters were treated with temephós and the residual effect was evaluated every 30 day after the treatment. Different residual effect was observed in the containers placed outside and inside the laboratory. The containers of one liter showed a longer residual effect than the five liters containers. The water salinity as well as the pH, during the test did not affect the larvicide effect.