Precor IGR Concentrate


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Precor IGR Concentrate effectively breaks the flea’s life cycle by not allow a flea to fully developing into an adult. This formulation prevents flea infestations and provides residual flea control.  If you have an active flea infestation Precor IGR Concentrate will work best in conjunction with an adulticide such as Alpine WSG.

Product Features:

  • Precor Insect Growth Regulator prevents flea emergence for up to 7 months.
  • Provides professional flea control without disrupting household activities.
  • Heavier-than-air molecules go deep into the base of carpets and upholstery.
  • Can be tank mixed with adulticide for more severe infestations.


  • Box of (10) x 1 oz. bottles
  • 16 oz. bottle


Product Alternative: Gentrol IGR Concentrate
EPA Registration No.: 2724-352
Active Ingredient: Methoprene – 1.2%
Precor IGR Product Information:

Precor IGR concentrate acts on the immature life stages of the flea, preventing the adult flea from developing. Flea eggs deposited on, and larvae crawling onto treated areas will not develop into adult fleas. Existing adult fleas and flea pupae are not affected. If a high population of adult fleas (the biting stage) is present, tank-mix with
an adulticide of choice that is EPA registered and properly labeled for flea control. To prevent infestations before they start, apply Precor prior to flea season. When applied to surfaces where fleas are found, such as carpets, upholstered furniture, and pet sleeping areas, Precor prevents adult flea emergence for up to 7 months. Controlling fleas on pets is important to prevent introduction of adult fleas indoors. If fleas are a problem on pets, treat the pets with an effective EPA registered flea control product.

Precor IGR Concentrate Application:

Prepare a diluted spray solution with a final (S)-Methoprene concentration of approximately 0.007%, by adding 1 fl. oz. of Precor to 1 gallon of water. Partially fill the mixing container with ½ gallon of water, add Precor, shake well, and then add the remaining ½ gallon of water. Shake well before each use.

When tank-mixing, follow the directions above except add the product to tank mix first, agitate, and then add Precor, agitate and complete filling of spray tank, and agitate once more. Apply at a rate of 1 gallon of the diluted spray solution per 1500 sq ft of surface area with any low pressure sprayer with a fan tip that is typically used for indoor applications. Treat all areas harboring fleas, including carpets, furniture, pet sleeping and bedding areas, and throw rugs. Treat under cushions of upholstered furniture.

Avoid contact with treated surfaces until dry. When applying to upholstery where staining could be a concern, apply dilution to a small inconspicuous location to determine if possible, staining could occur. Generally, Precor will not stain areas that would not be stained by water alone.

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