The use of sodium hypochlorite as ovicide against Aedes albopictus.

We describe the ovicidal action of a 3.75% (w/v) sodium hypochlorite solution on the eggs of Aedes albopictus (Skuse). The effectiveness of this ovicide has also been confirmed by a field trial. On the basis of the data collected in the city of Bologna, Italy, we hypothesize a relationship between the numerical increase of the Ae. albopictus eggs laid and the reduced daily variation of the relative humidity, facilitating the possibility of planning ovicidal treatments.