Altosid Pro-G Mosquito IGR - 10oz


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Altosid Pro G Mosquito Larvicide, manufactured by Zoecon, is a highly effective product designed for mosquito control. It harnesses the power of insect growth regulation (IGR) to combat the growth of troublesome mosquitoes and prevent them from causing issues.


This granular larvicide disrupts the life cycle of mosquito larvae using its potent active ingredient, (S)-Methoprene 1.5%. By either eliminating them before they hatch or rendering them genetically deformed and unable to reproduce, it effectively eliminates the threat posed by these insects.


Altosid Pro G Mosquito Larvicide provides exceptional mosquito control not only in your backyard but also in other designated areas. It offers extended residual control, delivering up to 30 days of protection against disease-carrying mosquitoes breeding in stagnant water.


To apply this product, no additional tools are required thanks to its convenient shaker top, which ensures easy and convenient distribution. However, if you choose to measure the product using utensils like tablespoons or measuring cups, it's crucial to note that these utensils should not be used after use with Altosid Pro G Mosquito Larvicide.

For your safety, it is recommended to wear personal protective equipment (PPE) such as gloves and safety glasses when handling the product to avoid any direct contact with the material.


How to Apply:

Step 1: Assess your yard and observe areas where stagnant water or water accumulation is present. Determine the required amount of Altosid Pro G Mosquito Larvicide by measuring the square footage of the water's surface area or the dry land site where water collects, as well as the water volume. To calculate square footage, measure the length and width of the treatment area in feet, and multiply them together (length x width = square footage). To determine water volume, measure the length, width, and depth of the designated water site, and multiply them (length x width x depth = water volume). The application rates will vary depending on the surface area/square footage (considering depths of water less than 2 ft.) or the dry land area where water typically accumulates and the water volume. The lowest application rate is 1/4 tsp. of Altosid Pro G Mosquito Larvicide per 13 sq. ft. of surface area/treatment area and water volumes of 50 gallons. The highest application rate is 1 cup of product per 2,400 sq. ft. of surface area/treatment area and water volumes of 9,600 gallons. For more specific rates, please consult the product label.


Step 2: Remove and dispose of any small containers containing water to enhance mosquito control. In cases where small containers cannot be overturned or discarded, such as flower pots, old tires, or urns, use approximately 80 granules of the product for every gallon of water. With gloved hands, evenly scatter the measured amount of Altosid Pro G Mosquito Larvicide over the surface of the water to be treated or the area prone to flooding in your yard.


Step 3: For ongoing mosquito control, reapply the appropriate amount of Altosid Pro G Mosquito Larvicide every 30 days throughout the active mosquito season.


Recommended Usage Areas:

Altosid Pro G Mosquito Larvicide is suitable for application in various environments, including both non-crop and crop areas. Crop areas encompass irrigated croplands, pastures, rangeland, vineyards, rice fields (domestic and wild), date palm, citrus, fruit, nut orchards, berry fields, and bogs. In non-crop areas, this product can be applied to snow pools, salt and tidal marshes, freshwater swamps and marshes (such as cattail, red cedar, and white maple marshes), woodland pools and meadows, dredging spoil sites, drainage areas, ditches, wastewater treatment facilities, livestock runoff lagoons, retention ponds, harvested timber stacks, swales, storm water drainage areas, sewers, catch basins, tree holes, animal watering troughs, water-holding receptacles (such as tires, urns, flower pots, cans, and other containers), as well as other natural and man-made depressions that hold water.


Moreover, Altosid Pro G Mosquito Larvicide can be applied to dry land sites that experience periodic flooding.


When to Apply:

Apply Altosid Pro G Mosquito Larvicide when mosquitoes are active, particularly after rainfall when various areas in your yard may have accumulated water. These areas can include bird baths, puddles, ditches, old tires, and other similar spots.


Safety Precautions:

When used in accordance with the instructions on the product label, Altosid Pro G Mosquito Larvicide is considered safe for use around children and pets. However, it is essential to follow the recommended guidelines. Additionally, ensure you wear the appropriate personal protective equipment (PPE) when handling and applying this product for added safety.


Things to Consider:


Please be aware that Altosid Pro G Mosquito Larvicide is not intended for use in swimming pools. If you consistently chlorinate your pool and adhere to proper pool maintenance practices, mosquitoes should not be able to breed in the pool.


When applying Altosid Pro G Mosquito Larvicide to areas that experience water flow or exchange, it's important to note that the effectiveness of the product may be reduced. In such cases, higher application rates and/or more frequent applications might be necessary to achieve the desired results.

Features and Specs 
Active Ingredient S-Methoprene 1.5%
Target Pest

Mosquitos, Mosquito Larvae

For use in

Bird Baths, Flowerpots, Ornamental Fountains, Gutters,Water Gardens, Rain Barrels, Pool Covers, Puddles, Horse Troughs and other animal drinking water receptacles 

* See label for complete list



* See label for complete application instructions

Pet Safe  Yes, if used as directed on label
Yield  2.5 lbs treats up to 5,445 sq. ft. or 20,183 Gallons of Water
Formulation  Professional Product
Shipping Weight 2.70 lbs
Manufacturer  Zoecon
EPA Registraction  2724-451