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Altosid® Briquets (PCO Pack)

Solid and cork-shaped, Altosid® Briquets feature (S)-methoprene to stop larval development in active mosquito breeding sites. This convenient formulation provides up to 30 days of control in standing water. Central Life Sciences’ Altosid® Briquets are an ideal solution for backyard mosquito control.

Active Ingredients:

    (S)-Methoprene (CAS #65733-16-6) 8.62%


Mosquitoes and other listed pests


Apply outdoors to potential mosquito breeding sites including catch basins, storm drains, birdbaths, gutters, tires, and other water-holding containers. Briquets can simply be dropped into areas with standing water.


  • No adverse effect on fish, waterfowl, mammals or beneficial insects
  • Contains a sustained release, offering residual control
  • Easy-to-use Altosid® mosquito larvicide
  • Insect growth regulator (S)-methoprene prevents adult mosquito emergence

Available Product Sizes

  • Pack of 100
EPA Reg. #2724-375
Backyard mosquito control with Altosid Briquets; insect growth regulator containing (S)-Methoprene. Mosquito larvicide dunks for breeding sites. Zoecon