Go Microbial on Mosquitoes

FourStar® microbial larvicide kills mosquito larvae before they become adults by using the naturally occurring bacteria Bacillus sphaericus (Bsph) and Bacillus thuringiensis israelensis (Bti). These active ingredients are inherent in soil and contain protein crystals that when ingested rupture the gut wall of the larvae causing larval death.


To enhance performance, FourStar® larvicides contain a patented “Dual Action” release technology. This innovative technology regulates the release of active ingredients to the water surface as well as throughout the water column to ensure a long residual and maximum coverage.


  • Positive environmental profile
  • The first microbial (Bti/Bsph) products offered in multiple formulations that offer extended residual and optimized delivery of the active ingredient to target site
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