BTI granules are a type of biological larvicide made from the bacterium Bacillus thuringiensis israelensis (\(BTI\)) used to kill mosquito larvae and other fly larvae in standing water. When applied to stagnant water, the granules sink and are ingested by the larvae, causing them to die within 24 hours. These granules are highly specific to target pests and pose minimal risk to humans, pets, birds, fish, and other non-target organisms.
How BTI granules work
Application: They are spread over the surface of stagnant water in places like ponds, bird baths, and drains.
Mechanism: The granules sink, and larvae that eat them ingest the BTI bacteria. Result: The BTI bacteria produce toxins that kill the larvae before they can develop into adult mosquitoes.
Lifespan: A single application can provide control for up to 14 days, depending on water conditions, and requires reapplication every 7 to 14 days for continuous control.
Benefits of BTI granules
Target-specific: They are highly selective and only affect larvae of mosquitoes and certain other flies, such as black flies and midges.
Environmentally friendly: BTI is considered organic and is practically non-toxic to humans, animals, and beneficial insects. It is approved by organizations like the EPA and the WHO for use in sensitive areas and even in some drinking water sources.
Easy to use: The granular form is convenient for applying to various water sources around a home or in public health programs.
Disease prevention: By killing larvae, BTI helps reduce mosquito populations, which can lower the risk of mosquito-borne diseases like West Nile, Zika, and dengue.
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