Larval control involves locating and treating breeding areas with larvicides to manage mosquito populations before they can mature into adults. The four products currently used by the county are:
- Natular - a granule formulation with the active ingredient spinosad. It has been classified as a reduced risk larvicide by U.S. EP.A. It is applied in granule formulation by spreading over mosquito habitats by 'hand' or using a back pack spreader.
- BVA 2 - This product is an oil that is applied by hand-spray units. This biodegradable film suffocates mosquito larvae and pupae.
- Natular T30 - The active ingredient in Natular is Spinosad, a naturally occurring organism in the soil. Natular T30 releases effective levels of Spinosad for up to 30 days
- Natular 2EC - a product used for killing mosquito larvae. It is an emulsifiable concentrate that is applied using hand spray units. Its active ingredient is also Spinosad.