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Target Pests


For Use In

ALTOSID® Briquets are designed to control mosquitoes in small bodies of water. Examples of application sites are: storm drains, catch basins, roadside ditches, fish ponds, ornamental ponds and fountains, other artificial water-holding containers, animal watering troughs, cesspools and septic tanks, waste treatment and settling ponds, flooded crypts, transformer vaults, abandoned swimming pools, tires, construction and other manmade depressions, cattail marshes, waterhyacinth beds, vegetation-choked phosphate pits, pastures, meadows, rice fields, freshwater swamps and marshes, salt and tidal marshes, treeholes, woodland pools, floodplains, and dredging spoil sites. For application sites connected by a water system, i.e., storm drains or catch basins, treat all of the water holding sites in the system to maximize the efficiency of the treatment program.



Unlike conventional pesticides, each Altosid® formulation contains (S)-methoprene, an insect growth regulator (IGR) that stops mosquitoes from becoming breeding, biting adults. (S)-Methoprene is target-specific and will not affect fish, waterfowl, mammals or beneficial predatory insects. As a result, you can feel comfortable using Altosid® in your district's most sensitive areas. And you'll feel even better about the effective, long-term control you'll get in return.

Best of all, the (S)-methoprene in Altosid® products has an excellent toxicity profile. So you get complete control without additional worries. Furthermore, residual larvicidal activity reduces adult populations and the need for adulticides.

Coverage Area

  • Slow release control for up to 30 days
  • The active ingredient (S)-methoprene
  • Hand application by operators on foot or in moving vehicles


Mix Rate

Ready to Use

Active Ingredient

ACTIVE INGREDIENT: (S)-Methoprene (Dry Weight Basis) (CAS #65733-16-6) . . . . . . . . . . . . . . 8.62% OTHER INGREDIENTS: . . . . . . . . . . . . . . . 91.38% Total . . . . 100.00%

How To

The ALTOSID® Briquet is a formulation designed to release effective levels of ALTOSID® Insect Growth Regulator up to 30 days under typical environmental conditions. Release of ALTOSID® Insect Growth Regulator is effected by dissolution of the ALTOSID® Briquet.

If briquets become covered by obstructions such as debris, vegetation, and loose sediment as a result of high rainfall or flow, normal dispersion of the active ingredient can be inhibited. Water flow may increase the dissolution of the briquet thus reducing the residual life of the briquet. Inspect areas of water flow to determine appropriate retreatment intervals. To assure positive results, place ALTOSID® Briquets where they will not be swept away by flushing action.

ALTOSID® Briquets prevent the emergence of adult mosquitoes including Anopheles, Culex, Culiseta, Coquillettidia, and Mansonia spp., as well as those of the floodwater mosquito complex (Aedes, Ochlerotatus, and Psorophora spp.) from treated water. Treated larvae continue to develop normally to the pupal stage where they die.

Altosid 30 Day Briquets

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Altosid 30 Day Briquets

No two mosquito habitats are alike - and neither are the ways you treat them. That's why there are a variety of Altosid formulations. Each provides the extended control you need in easy-to-access or difficult-to-treat areas. Altosid formulations are labeled for use in known fish habitats.
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