Larvicides and Insect Growth Regulators will affect the larvae stage of the mosquito, preventing them from maturing. They provide 30 days of control.
Larvicides such as Mosquito Bits, Mosquito Dunks BT, Bonide's Mosquito Beater WSP (Bacillus thuringiensis) and Insect Growth Regulators with Methoprene such as Altosid Pro-G, Altosid Briquets are applied to standing water or stagnant water where mosquitoes breed. Unused pools, pool covers, puddles, bird baths, rain barrels, gutters, flowerpots, ornamental fountains, gutters, horse troughs, and other water-holding receptacles are ripe for mosquito breeding. Bacillus thuringiensis (Bt) is naturally found in the soil. It makes toxins inside the gut of the mosquito when eaten by the mosquito larvae. The mosquitoes die of starvation and infection. Methoprene prevents the larvae from becoming an adult.
Mixing an IGR (Insect Growth Regulator) like Pivot 10 with Bifen IT (Mosquito Combo Kit) and spraying the vegetation will also target the mosquito larvae as well as the adult mosquitoes.