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Altosid® 150-Day Briquets

Altosid® 150-Day Briquets offer pest management professionals a cost-effective solution for controlling mosquito populations all season long. Formulated with U.S-produced (S)-methoprene, this product controls mosquito larvae and prevents the emergence of adult mosquitoes - all without negatively impacting the surrounding ecosystem.

Active Ingredients:

  • (S)-Methoprene (CAS #65733-16-6) 2.1%


Designed to control the larvae of many mosquito species.


Simply place one briquet in areas where there is currently standing water or where flooding is anticipated. This includes catch basins, pre-flood land, sewers, ornamental ponds, and other water receptacles.


  • Ready-to-use format allows for easy, low labor applications
  • Provides control of mosquito populations all season long
  • Slim design fits through virtually any sewer grate
  • Does not have a negative impact on fish, waterfowl, or mammals

Available Product Sizes

  • 10 briquets per pack