Top 5 Best IGRs For Fleas (2022 Review)

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Home > Product Reviews > Flea Products > Top 5 Best IGRs For Fleas (2022 Review)

Looking for an IGR to stop fleas from reproducing in your home?

Perfect! In this Pest Strategies guide you’ll learn the following:

  • What an IGR is and how they work
  • How to use an IGR to get rid of fleas
  • Which IGR is the best for flea removal

And much more!

Below is a quick list of all my top picks. Keep scrolling to learn more about my best buying tips and tricks.

Our Overall #1 Rated Pick

PT Alpine Flea Insecticide with IGR

  • Aerosol that is ready to use
  • Non-repellent contact kill
  • Two active ingredients, Dinotefuran and Pyriproxifen

The best thing about PT Alpine is also the most obvious, it’s an aerosol that is quick and easy to use without any mixing or measuring required. Pop off the lid, give it a shake, and you’re ready to start spraying those pesky fleas.

The second best thing about it is that it contains two active ingredients, one to kill the fleas and the IGR.

It also contains a synergist to accelerate the action of the other chemicals. It is literally an all-in-one solution to your flea infestation problems.

When you’re done, the fleas are dead, those that hatch afterward can’t lay eggs, and the residual impact lasts for several months. Best of all, when the can is empty, just throw it away; no messy clean up required.

Reviewed By:
Ed Spicer

Ed has been working in the pest control industry for years helping 1,000's of homeowners navigate the world of insect and rodent management. He manages Pest Strategies now helping homeowners around the world!

Best Service
Overall Rating
4
Best Overall
Overall Rating
4.8

NyGuard

Features
  • Lasts for up to seven months
  • Labeled for food and non-food areas
  • The active ingredient is Pyriproxifen

Tekko Pro IGR

Features
  • Least expensive IGR per ounce
  • A proven product
  • The active ingredient is Pyriproxifen

Precor

Features
  • Safe to use around pets
  • Long-term residual
  • The active ingredient is (S)-Methoprene

PT Alpine Flea Insecticide with IGR

Features
  • Pet friendly
  • Non-repellent contact kill
  • Two active ingredients, Dinotefuran and Pyriproxifen

Pivot 10

Features
  • Non-repellent contact kill
  • Lasts for up to seven months
  • The active ingredient is Pyriproxyfen

Table Of Contents

    Top 5 Best IGR for Fleas

    Are you short on time or just want a quick answer?

    1. PT Alpine Flea Insecticide with IGR
    2. Pivot 10
    3. NyGuard
    4. Tekko Pro IGR
    5. Precor

    What Are IGRs For Fleas?

    In layman’s terms, Insect Growth Regulators, IGRs, are birth control for bugs. That’s a vast oversimplification that completely ignores how IGRs actually work, but it is a perfectly accurate way to describe the results of using an IGR.

    They aren’t fatal for adult insects. Instead, they prevent reproduction in the next generation in one of several ways. In order to use an IGR correctly, you’ll need to combine it with an insecticide to kill the adult fleas.

    If you don’t mix a regular pesticide with the IGR, or use it in combination with the IGR, the adults will continue laying eggs, which, because they were laid after the IGR was sprayed, will be less affected by it.

    Read Also: What are the best flea traps on the market today?

    What Are The Different Types of IGRs For Fleas?

    IGRs are divided primarily by the active ingredient, secondarily by added chemicals such as synergists and knockdowns.

    Pyriproxifen

    This IGR has to be touched and/or eaten by insects. It’s often used directly on many pets for flea and tick control, so it will be safe to use around your own pets.

    It has a good residual impact indoors but it breaks down quickly in direct sunlight.

    Methoprene

    It comes in two different forms, s-methoprene and r-methoprene.

    S-methoprene is the one that mimics juvenile growth hormones in insects so pay close attention to the label when you’re buying an IGR.

    It works by inhibiting the growth of young insects and often results in them looking strangely deformed.

    (S)-Hydroprene

    Normally found in Gentrol, this active ingredient is effective against cockroaches, beetles, and moths. Although fleas aren’t listed on the label, it is effective against them.

    However, since the label is the law so we won’t list this one for use against fleas.

    Dinotefuran

    This is an insecticide in the neonicotinoid class. They are “new nicotine-like” insecticides that attack the receptors in nerve synapses in the central nervous system of many insects.

    This isn’t an IGR. It’s an insecticide often used in conjunction with them.

    It has a fast knockdown on adult fleas and a good residual impact, lasting up to three months in some cases.

    Prallethrin

    This is another insecticide that is often used in combination with IGRs. It is a member of the pyrethroid family of pesticides.

    Pyrethroids mimic the action of natural ingredients found in chrysanthemum flowers.

    Read Also: Our recommendations for flea sprays that actually work

    How Do IGRs For Fleas Work?

    An IGR is an insecticide that mimics the juvenile growth hormones in young insects, thus disrupting the way they grow and reproduce. They work on many different insects including cockroaches, mosquitoes, bed bugs, and fleas.

    • Eggs treated with an IGR may not hatch, or the young that manage to hatch don’t survive long enough to mature into egg-laying adults.
    • Restricted maturation is another mode of action for IGRs. The fake hormones prevent the young from maturing to the egg-laying stage. They will often be unable to shed their old skin during the molting process. If they can’t molt, they can’t grow.

    Insects trapped inside their old skin will often appear warped or mutated as their body tries to grow in the old skin. Eventually, they will be squeezed to death due to the inability to molt. Pest control technicians sometimes refer to these insects as being “i-grr-ed”.

    • Hyper-accelerated growth is the third mode of action. In this mode, the insects grow so quickly they bypass the sexual development stage and become neutered adults who have no reproductive ability.

    Except for PT Alpine, you’ll have to do some tank mixing in order to use IGRs. This video demonstrates the normal method for mixing pesticides in a 1-gallon sprayer.

    Compare Pest Control Companies Near You

    Are IGRs For Fleas Dangerous To Pets or Children?

    Yes and no.

    IGRs affect hormones that are present in insects, not mammals, so the active ingredients, as such, aren’t dangerous to pets and children at all. However, some of the so-called inert ingredients may be a different story.

    All pesticides have some level of toxicity associated with them and children, due to their small size and immature bodies, are more susceptible to harm than adults. They eat and drink more due to their relative body weight, which can lead to a higher amount of pesticide residue per pound in their bodies.

    Infants in particular will be more exposed to any pesticide as they crawl around, put things in their mouths, and explore everything they encounter with their hands and feet.

    Always keep infants out of treated areas for at least 1-2 days until the chemicals are completely dry and the air is clear of fumes.

    Read Also: How do you get rid of fleas in your carpet?

    Our Reviews Of The Best IGRs For Fleas

    Related Articles

    PT Alpine Flea Insecticide with IGR

    This pet-safe aerosol is perfect for homeowners who don’t want to be bothered with mixing chemicals. It contains two main active ingredients, plus a third one that acts as a synergist.

    The combined result is an easy to use, all-in-one approach to killing fleas.

    One 20-ounce can will treat 2,625 square feet. You need to hold the can upside-down when spraying. Cover every inch of the house so the fleas don’t have anywhere to hide.

    Make sure you get all the cracks and crevices along the baseboards, doors, and windows.

    Since you also need to treat all your fabric furniture, drapes, and beds, one aerosol can may not extend as far as it claims. You’ll probably have to get two of them to completely cover the entire house.

    The Good And The Bad

    • Safe for pets
    • Non-repellent contact kill
    • Aerosol can is ready to use
    • Two active ingredients, Dinotefuran and Pyriproxifen
    • Doesn’t reach as far as the label claims
    Overall Rating
    4.8

    NyGuard

    This IGR breaks the reproductive cycle of the toughest insects such as ants, cockroaches, fleas, flies, and mosquitoes. It is labeled for use in the food-handling areas of restaurants, bakeries, and food processing plants.

    It is a concentrate, so you’ll need to mix it in a 1-gallon sprayer such as this one or this one. You should also add a strong pesticide, labeled for adult fleas, to the tank when you mix it.

    The combination will be a fatal one-two punch to fleas and their young.

    This is a commercial-grade pesticide that should be treated with respect.

    The Good And The Bad

    • Lasts for up to seven months
    • Labeled for food and non-food areas
    • The active ingredient is Pyriproxifen
    • Requires the use of a 1-gallon sprayer
    • Requires the addition of a pesticide for adult fleas

    Pivot 10

    Even though it contains exactly the same active ingredient as NyGuard, in exactly the same strength, this is still the most expensive IGR per ounce on our list. It is a commercial-grade pesticide in a small 3.72-ounce size that’s perfect for home use.

    It will last for up to seven months inside, considerably less outside where it is in direct sunlight. It requires the use of a 1-gallon sprayer, power sprayer, or other delivery device.

    You’ll have to mix it with a pesticide that is labeled for adult fleas.

    This small bottle of concentrate will cover between 6,000 and 13,000 square feet depending on the severity of the infestation you’re facing.

    The Good And The Bad

    • Small size is ideal for homeowners
    • Lasts for up to seven months inside
    • The active ingredient is Pyriproxyfen
    • Requires the use of a 1-gallon sprayer
    • Requires the addition of a pesticide for adult fleas

    Tekko Pro IGR

    This uses the same active ingredient as NyGuard and Pivot but at a weaker concentration. It is a proven product used by pest control professionals but it doesn’t last as long as the others.

    It will have to be applied more often to achieve the same results. It requires the use of a 1-gallon sprayer and a regular pesticide for full effectiveness.

    The Good And The Bad

    • A proven product
    • Least expensive IGR per ounce
    • The active ingredient is Pyriproxifen
    • Doesn’t last more than 60 days
    • Requires the use of a 1-gallon sprayer
    • Requires the addition of a pesticide for adult fleas

    Precor

    Price-wise, it’s in the middle of the pack but the performance is completely lacking outside in the sun. It won’t work outside at all.

    Inside, it will last for up to seven months. One ounce of concentrate per gallon of water will treat 1,500 square feet.

    It is safe for pets when it’s dry. It requires the use of a 1-gallon sprayer and the addition of a pesticide that is labeled to kill adult fleas.

    The Good And The Bad

    • Safe to use around pets
    • Long-term residual impact inside
    • The active ingredient is (S)-Methoprene
    • Doesn’t work outside
    • Requires the use of a 1-gallon sprayer
    • Requires the addition of a pesticide for adult fleas
    Compare Pest Control Companies Near You