Altosid PRO-G Insect Growth Regulator
Best granular larvicide for homeowners managing standing water mosquito breeding grounds.
Altosid PRO-G Insect Growth Regulator is a granular larvicide from MCS Products designed to prevent mosquitoes from developing into biting adults. It effectively targets mosquito larvae in standing water, offering up to 30 days of residual control. This product is ideal for backyard mosquito control, helping to protect against disease-carrying mosquitoes. Its granular form and convenient shaker top make application straightforward for treating areas up to 5,455 square feet.
$74.99
Owner Satisfaction
4.7
/ 5
Category Rank
23
/ 1717
#23 in Pesticides
Price vs Category Average
+69%
Above average
Active Ingredient
1.5
/ % (S)-Methoprene
Who it's for
- Homeowners seeking proactive mosquito population management
- Eco-conscious gardeners protecting local wildlife and beneficial insects
- Busy property managers needing long-lasting, low-maintenance pest control
Who should skip it
- People needing immediate relief from active biting adults
- Users dealing with dry-land pests or non-aquatic infestations
- Casual applicators lacking the time for precise life-cycle monitoring
Performance breakdown
Larvicidal Efficacy
Methoprene effectively halts the mosquito life cycle before adulthood is reached.
Residual Protection
Thirty days of active control significantly reduces frequent reapplication needs.
Application Convenience
The integrated shaker top makes treating standing water intuitive and mess-free.
Coverage Efficiency
Treats over five thousand square feet, ideal for most residential backyards.
Environmental Versatility
Highly effective in stagnant water but lacks resistance to heavy rainfall.
Safety Profile
Requires careful handling as it is not labeled safe for pets.
Key Specs
Active Ingredient
1.5% (S)-Methoprene
Container Size
2.5lb
EPA Registration Number
2724-451
Application Coverage
Treats up to 5,455 sq ft or 20,183 gal of water
Form
Granular
Country of Origin
United States
Residual Effect
30 days
Target Life Stage
Larvae
Features
- Stops mosquito larvae from becoming adults
- Provides up to 30 days of protection
- Granular insect growth regulator
- Easy shaker top application
- Targets disease-carrying mosquitoes
- For use in standing water
- Odorless formula
What customers say
Consumers consistently highlight the product's exceptional reliability and long term value. This granular regulator earns high marks for its proven effectiveness in disrupting mosquito life cycles, often eliminating the problem before it starts. Users appreciate that the results are predictable and long lasting, translating the initial investment into significant savings and peace of mind compared to short lived solutions.
Know before you buy
This product contains (S)-methoprene, an insect growth regulator that disrupts the development of mosquito larvae. It prevents them from maturing into biting adults, effectively breaking the mosquito life cycle in standing water.
You should apply the granules directly to areas of standing water where mosquitoes breed, such as bird baths, ornamental ponds, rain barrels, clogged gutters, or low-lying areas in your yard that hold water after rain.
A single application provides up to 30 days of residual control. You should monitor the treated areas and reapply as needed to maintain protection throughout the mosquito season.
No, this product is not labeled as pet or child safe. You should keep children and pets away from treated areas until the granules have fully dissolved or settled into the water.
Yes, the formula is not rain-resistant. Heavy rainfall or water overflow may dilute or wash away the granules, potentially requiring a reapplication to ensure continued effectiveness.
The container features a convenient shaker top, making it easy to apply by hand to smaller areas. While the specifications mention a sprayer for certain applications, the granular form is primarily designed for direct distribution from the shaker container.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$75