We evaluated the effectiveness and duration of effectiveness of a new formulation of Bacillusthuringiensis var. israelensis (Bti) for control of larval Aedes albopictus. The product tested was Vectobac® DT(ABG-6499), a Bti tablet formulation containing 3.4% of active ingredient (3,400 ITU/mg) supplied by SCAEValent BioSciences Italy S.r.l. The study was conducted at the Botanical Garden of the University of Rome "LaSapienza" between June and September 2002...