Pyriproxyfen Nylar

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Novacide Flea & Tick Killer
As low as $27.99
Tekko Pro IGR Insect Growth Regulator
Emulsifiable Concentrate (EC)
As low as $40.99
Keith's Pro Tips

"When using Pyriproxifen, make sure that you are using an insecticide with it to kill the pests you are targeting. Apply every 3-6 months to keep the target insect under control. Do not overmix the application when you treat with this product."


There are a variety of pesticides that deal with adult insects, but another useful item to totally eliminate an infestation such as mosquitoes, ants, fleas is with an insect growth regulator which specifically targets the many eggs laid by these pesky insects, stopping them from growing and hatching. An active ingredient that does a great job of doing this is Pyriproxyfen.

On this page, we will share with you some background information on Pyriproxyfen, a popular active ingredient for insect growth regulators like Tekko Pro. We will cover its beginnings and mode of action which makes it effective. Here you can also shop the insecticide products we have in stock which are based with Pyriproxyfen.

What Is Pyriproxyfen?

Pyriproxyfen, registered for use as an insecticide in the US in 1995, is an active ingredient used to control insect infestations consisting of fleas, ants, cockroaches, mosquitoes, and other insects. This ingredient belongs to a class of insecticides known as Insect Growth Regulators, or IGRs. IGRs inhibit the life cycles of insects so they cannot develop into reproductive adults. This causes the pests to die out with no viable generation to continue the infestation.

How Does Pyriproxyfen Work?

Pyriproxyfen works when a pest comes in contact with or ingests the chemical. This active ingredient is a juvenile hormone analog and mimics the presence of certain hormones. When these hormones are detected in high enough levels, the insect’s ability to molt or develop into more mature life cycle stages is disrupted.

In studies conducted on mosquitoes, researchers found that when adult mosquitoes were exposed to pyriproxyfen, they found reduced egg laying, reduced egg hatching, and fewer larvae successfully developed into adult mosquitoes.

Benefits of Pyriproxyfen

Pyriproxyfen can successfully target and regulate fleas, ticks, ants, roaches, bed bugs, and other stored product pests.

Pyriproxyfen has been widely used on numerous field and greenhouse crops for controlling pests such as whiteflies and aphids. It’s also added to ponds and catch basins to kill mosquito larvae. And it’s used for pest control at residential and industrial sites, both indoors and outdoors.

Drawbacks of Pyriproxyfen

While Pyriproxyfen is effective in addressing undeveloped insects and their eggs, it does not affect adult insects. We recommend using this IGR with an adulticide so you can tackle the entire insect life cycle.

Pyriproxyfen cannot be applied to the bodies of pets as it can cause irritation.

Is Pyriproxyfen Safe?

Products made with Pyriproxyfen are safe to use in and around the home when used according to label directions. Always wear the proper personal protective equipment, or PPE, when applying any insecticides and keep them out of reach of any children or pets. Wear as much coverage as you need to avoid direct skin contact and a respirator or other facial covering to avoid inhalation. Brief exposure may cause mild irritation or uneven breathing, but symptoms should recover shortly.

How To Use Products with Pyriproxyfen

If you’re looking for broad-spectrum control that will kill adult pests as well as control juvenile pests, then check out Novacide Flea & Tick Killer. Despite its name, Novacide kills many insects, not just fleas and ticks. This product also controls ants, firebrats, cockroaches, stored product pests, and other insects. Novacide is made with 0.1% pyriproxyfens, 0.05% pyrethrins, and 0.4% permethrin. This product comes ready-to-use as an aerosol spray insecticide.

Applying Novacide Flea & Tick Killer

To apply Novacide, shake the can well, hold it at an arm’s length, then apply to carpets, floors, furniture, pet bedding, and other surfaces where labeled pests can be found. The product will be applied parallel to the can’s orientation, so to apply downwards, hold the can upside down, pointing the top where you want to apply. Use a sweeping motion, and back away while holding the can 36 inches away from the area being treated.

To treat pantry shelves, create a barrier along where the shelves meet the wall by applying 1-2 inch spots of product 1-2 inches apart.

Do not allow people or pets into the treatment area until the product dries completely. Depending on the pest you’re treating, you may need to conduct a follow-up application after 10 to 21 days.

When dry, Novacide will leave a residual that will continue to treat the area for up to seven months. Labeled pests that make contact with the spray or its residual will die within several hours, while immature pests will be affected by the product’s IGR, which will stunt their growth and prevent them from becoming reproductive adults.

Broadcast Application over Lawn

If you’re looking to control insects indoors & outdoors, then check out Tekko Pro IGR. Tekko Pro IGR is an Insect Growth Regulator made with 1.3% pyriproxyfen and 1.3% novaluron. This product is a liquid concentrate, so it must be mixed with water before application. We recommend you mix and apply this product with a handheld pump sprayer.

Depending on the pest you’re targeting, you’ll mix the product’s labeled rate of 1 to 2 fluid ounces of product into 1 gallon of water for every 1,500 sq ft of treatment area.

Application areas include, but are not limited to, carpets, box springs, baseboards, underneath appliances, around windows and door frames, on vertical surfaces like walls, in ornamental beds, or over lawns.

Juvenile pests that make contact with the chemical or its active residual activity will have their life cycles impacted and will be unable to develop into reproductive adults.

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