Precor IGR Insect Growth Regulator Review

Precor IGR Insect Growth Regulator Review

Overall Rating
Speed of Results
Application Frequency
Kills Other Insects
Ease of Application

Targets Flea Eggs and Larvae

PreCor IGR is designed to target the immature stages of the flea such as the egg stage and the larvae stage.  It works by halting the progress of any development; eggs won’t hatch and larvae with no develop into adult fleas.

It is not meant to be used alone since it does not target the adult flea or the pupae which turn into adult fleas. Using this product will control pre-adult fleas for up to 7 months.

It is in concentrate form so you mix it with water to have the mixture you need. (1 gallon of water to 1 ounce of PreCor IGR.)

Your best course of action is to get a head start on the flea season if possible by treating prior to when you see any fleas. By combining PreCor IGR with a monthly preventative for your pet and a product that attacks adult fleas and pupae you are completely covered when fleas do start to show up.

What does it Kill/Repel

PreCor IGR stunts the growth of flea eggs and larvae, preventing them from developing any further.  It doesn’t kill them but it inhibits the growth so they can’t produce any more fleas

Speed of Results

Once the treatment is done, if a flea egg drops off your pet or larvae is present it will prevent maturation right away so there is a noticeable change in the flea population in the very first week. The effects last up to 7 months, continuing to prevent maturation of any eggs that are laid and any pupae that hatches from their cocoons.

Application Method and Instructions

Precor IGR Insect appUsing PreCor IGR is not overly complicated at all.  You will start by preparing a solution that is made by combining one ounce of PreCor IGR with 1 gallon of water.  The best way to do this is to add ½ a gallon of water to the jug, add the PreCor IGR and then the other ½ gallon of water. Shake the container thoroughly to mix the solution.

If you are going to be using a spray tank the mixing directions are similar but you will add the product to the tank mix first, mix it up, add PreCor IGR, mix again and complete the tank filling process.  The last thing you will do is mix everything that is in the tank up before us.  1 gallon of the solution will take care of 1500 square feet of space. Use a low pressure sprayer for indoor use. The best is the kind with a fan tip.  You will need to treat all of the areas in the home that are being affected by fleas.  These areas include:

  • Carpets
  • Furniture
  • Pet bedding
  • Pet sleeping areas
  • Throw rugs
  • Under furniture cushions
  • Under furniture
  • Under beds
  • In the bottom of closets

If there are any other areas that you know need treating, be sure to treat those as well.  Let everything dry thoroughly before allowing animals and children back into the room.

The best thing to do is to remove family members and other animals while treating the e house and stay out of the house for awhile.  Once you let everything dry, air out the house for about 20-30 minutes before resuming normal activities.

Ingredients Used

The active ingredient in PreCor IGR is methoprene, which is a popular ingredient in many flea treatments.

Things to Watch Out for

Methoprene, the active ingredient in PreCor IGR is hazardous to animals and pets and should not be kept near them. While you’re treating your home, pets and children should not be in the home at all until the product dries completely.  Keep the bottle out of reach of children.

If you are concerned about the product staining your chairs or sofas, try a small spot that isn’t seen to see if there is any discoloration before you spray the entire piece of furniture. Normally there will not be staining but it is always best to check first rather than ruining a whole piece of furniture.

Safe for Pets and Children to be Around?

This product is harmful to people and animals and care should be taken when handling it. Wash your hand with soap and water immediately after treatment.  Keep children and pets away from freshly treated areas and never let the child do the spraying.

Safe for Plants/flowers?

Most pesticides are not good for plants, flowers and trees so take extreme care when doing your treatment, not to spray your flower beds, plants and trees.

What are Customers Saying?

There are so many different kinds of flea treatments on the market today that trying to choose from them can be a real challenge. This is why customer feedback and comments can be a real help in determining whether a product is the right one for your needs. Here are some of the comments customers are making about PreCor IGR.


PreCor IGR is a great addition to other forms of flea control that you may be using. It can be the missing piece that truly gives your flea treatment the punch it needs.  It is easy to use, works for up to 7 months from the time of application and you will see major results when using it along with a preventative and a product that kills the adult and pupae stages.

For more Information and to order yours, Click the Link below:

Precor IGR Insect Growth Regulator