NyGuard IGR

$49.50 - $483.20

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4.5 out of 5 stars Rating: 4.5

48 Reviews | 58 Q&A



{ $49.50 { $48.99 { $48.68 { $48.32 $149.99 $148.00 $483.20
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NyGuard IGR bottle (140 ml)

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NyGuard IGR 480 ml bottle (480 ml)

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NyGuard IGR - CASENyGuard IGR - CASE case (10 x 140 mL bottles)

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NyGuard IGR

Nyguard IGR concentrate is a new Insect Growth Regulator with a broad label that delivers excellent results. This product will break even the toughest insect's reproductive cycle to stop future infestations. NyGuard IGR Concentrate is also available in convenient premeasured 1 oz bottles called NyGuard EZ1.

NyGuard IGR gets to the root cause of chronic insect infestations - the eggs, larvae or nymphs - and prevents them from maturing into reproductive adults thereby controlling future infestations. NyGuard IGR will cause morphological anomalies or changes and disrupt the expected insects' state of development, leading to sterility or death. When adults are present, NyGuard is commonly used in combination with a non-IGR insecticide. This method results in rapid eradication of adults and deposits a base level of NyGuard IGR. Since this product has a long residual, it remains in place for up to seven (7) months to actively disrupt the development of any immature stages that have yet to appear, or which were not susceptible to the insecticide product used to control adult insects.


  • NyGuard IGR has the broadest spectrum of insects on its label.
  • NyGuard IGR is 10 times more active than Gentrol.
  • NyGuard IGR is effective both indoors and outdoors.
  • NyGuard IGR may be used in food and non-food areas.
  • NyGuard IGR keeps working for seven months.


Apply NyGuard as a diluted spray or ULV/fogger to prevent eggs, larvae and nymphs from maturing into reproductive adults. Apply NyGuard in combination with a non-IGR adulticide to knockdown and kill existing adult populations while breaking the cycle of your toughest insect pests.

Rating Snapshot

5 stars   38
4 stars   6
3 stars   0
2 stars   0
1 star   4

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Average Customer Rating
4.5 out of 5 stars (48)

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Most Helpful Customer Reviews
  • 43 of 45 people found this review helpful:

    5 of 5 stars  Sprayed for fleas got prehatched mosquito's
    By Norma in St. Augustine, Florida on 07/10/2012
    Verified Purchase

    We used a combination of Nyguard and Talstar 1 early in June. We got an immediate kill on fleas, and other nasty bugs outside, but I wasn't expecting the destruction of the majority of the Mosquito eggs. I have lived in this house in Florida for 21 years. For 21 years I had to stay inside much of the time, at dusk especially but also all day and all night because our area had so many mosquitos. A lot didn't seem to be stopped by repellants either. We had a long dry spell and then about a week and a half after we sprayed, it begain to rain some every day, then it rained all day for several days. We needed it badly but I wasn't looking forward to being swarmed by mosquitos. I was astonished! We have had very few even at dusk, and those who managed to hatch are strange. They fly slow enough so that I can kill them before they ever land. It is like they are can't navigate normally. This is the first summer I have not gotten even one bite. I have been able to enjoy the outside again for the first time ever at this house. I reordered the same items and intend to spray one more time before the month of July is over. Just some advice to those who have houses that back up to woods, we sprayed the wooded area as well as the yard. We sprayed our neighbors yard and the small wooded area behind her house. A lot of mosquitos breed under damp leaves that pile up on the ground here in Florida. Well not anymore at may house! We even sprayed across the road in the brush. Good thing too, because they discovered the mosquitos were carrying West Nile Virus in our area. Best thing I ever did in the rhelm of insect control!

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  • 33 of 35 people found this review helpful:

    5 of 5 stars  I am blown away!
    By John in Baxter, Tennessee on 07/31/2012
    Verified Purchase

    This is the very best pest control I have ever used! I had an issue with fleas in my dog pen. I could not get them killed out for nothing until I was told about NyGuard. I used every product I could think of and spent a small fortune! A flea or two would attach itself to me when I would clean my dog pen, and next thing I knew is they were in my house too! NOT ANYMORE! This NyGuard mixed with Demize, totally killed out the fleas...inside and out in 24hrs! And they stayed gone. Now I don't even need flea collars for my dogs! Thanks for such a great product. Send me a hat or something so I can advertise for you, because your product is the best on the market...hands down! I am going to purchase more of this product so I never run out. I NEVER toot someones horn unless they deserve it...and NyGuard deserves it! So, TOOT TOOT!

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  • 32 of 34 people found this review helpful:

    5 of 5 stars  A true KNOCKOUT
    By David on 09/15/2011
    Verified Purchase

    After fleas had set up house in ours we attempted to get rid of them in the usual manners (fogging and flea powder). We got desperate and were about to burn down the house (not really) and then I found this site. What a life, and house, saver. Less than 2 hours after application the fleas stopped biting and we have never had a problem since. I use it on my balcony for season long wasp and spider control and swear by it. You can't miss when you pick this product.

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  • 29 of 32 people found this review helpful:

    5 of 5 stars  This Product Works!!!!
    By Marianne in Roswell, GA on 06/07/2011

    I purchased this product as a safer product to control indoor and outdoor insects (mosquitoes, fleas, flies, roaches, ants, etc....). Nothing bothers me inside or outside after 3 months!!! It's a little slow to start, but once you get it applied around your house and inside your house, your problems are over!!! I had continual repeat flea issues from my Welsh Corgi. I treated the inside of the house and also treated the outside areas where she laid. NO MORE FLEAS!!!! And it does wonders in keeping mosquitoes under control, too!!!!

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  • 20 of 22 people found this review helpful:

    5 of 5 stars  Excellent product
    By Li in Saint Paul on 05/08/2013

    The person who was talking about how her cats still have fleas weeks later does not know how this product works. It stops the next generation from growing into viable adults. If you have fleas, you have to do a multi-angled approach and not just spray & pray. Seriously, if you don't know what you're doing. Don't buy the product. I've used this for years on all sorts of issues and it's as close to a magic wand as you're gonna get.

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Most Recent Customer Reviews
  • 6 of 6 people found this review helpful:

    5 of 5 stars  NyGuard IGR
    By Tg in CA on 11/26/2015

    Two big differences between NyGuard and other IGR's my company uses: 1. It is photostable. Most IGR's break down after a week or two in the sun, NyGuard doesn't. Means you can effectively use it indoors or out. 2. It has no odor so it can be mixed with non-repellent products. This is a big deal when dealing with social insects (roaches especially). It is the only IGR I carry in my truck, and after the current stock of Precor & Gentrol runs out it will be the only IGR my company will use from now on. Highly recommend.

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  • 9 of 10 people found this review helpful:

    1 of 5 stars  NyGuard Doesn't Work!
    By Rick in Rockwood, Tn. on 10/21/2015

    I've sprayed my indoor outdoor carpeting twice with double the recommended strength and still have fleas

    Expert Response   Expert response:
    We apologize you did not receive the expected results.Fortunately you chose a product that inhibits breeding. Nyguard does not kill fleas at all. It stops immature fleas from reaching sexual maturity which will help stop the population from growing. It is important that you use the Nyguard with an insecticide such as Onslaught or Fenvastar to kill the jumping, biting adults. You should also note that it can take 2-8 weeks to gain control. Please take a few moments to read our How to Treat for Fleas Guide to learn how implement a successful flea control program. Flea elimination will require you to use a mix of insecticide and non-chemical practices to gain control. Please let us know if we can be of further assistance. We are always happy to help! http://www.domyownpestcontrol.com/how-to-get-rid-of-fleas-a-483.html (Please be sure you follow the product label instructions and do not use more than instructed. Failure to follow these instructions can make treatments less effective and unsafe)

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  • 8 of 8 people found this review helpful:

    5 of 5 stars  Great for fleas
    By James in Merced ca. on 08/19/2014

    Had a bad flea problem in back yard sprayed 2 times with telstar they came back in 2 weeks then mixed in some nyguard haven't seen a flea since

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  • 7 of 7 people found this review helpful:

    5 of 5 stars  Good stuff
    By Nick in IL on 12/05/2013
    Verified Purchase

    Before you buy archer IGR take a look at the % active ingredient and compare with this. NyGuard costs far less and makes many more gallons. Worked great on a flea problem when combined with conquer.

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  • 5 of 5 people found this review helpful:

    5 of 5 stars  I am happy with the results
    By Kevin in Bakersfield, California on 11/05/2013
    Verified Purchase

    I purchased this to use with Talstar liquid. The roach problem has been solved. I can't say which product did the job but will continue to use both. This product is supposed to work on the future generations as opposed to the initial kill.

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  • 6 of 6 people found this review helpful:

    5 of 5 stars  Beyond expectations
    By in Harvard, Il on 07/10/2013
    Verified Purchase

    I put this product down around the house and the cycle of the fleas stopped. I can't describe the relief, after trying other "flea killers", of having no more flea problems. I used this in combination and I have no more pests. Great product and well worth the cost.

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  • 6 of 6 people found this review helpful:

    5 of 5 stars  Great on flea issues
    By Christina on 02/13/2013
    Verified Purchase

    I'm a property manager and one of my tenants had a flea issue. My maintenance guys used this product and it got rid of the flea issue in this apartment. I'm looking forward to using it on another apartment!

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  • 9 of 9 people found this review helpful:

    5 of 5 stars  NyGuard IGR
    By Bill in bartlesville, OK on 09/10/2012
    Verified Purchase

    Had a recent flea and cricket infestation that we couldn't get under control. This mixed with some Permethrin SFR worked wonders.

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  • 6 of 25 people found this review helpful:

    1 of 5 stars  Nyguard
    By Janice in Warren, OR on 06/23/2012
    Verified Purchase

    I sprayed the mixed liquid on all my rugs and my 4 cats still have fleas, I am not happy with this purchase. This has been over 2 weeks!

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  • 12 of 12 people found this review helpful:

    5 of 5 stars  NyGuard
    By Rosemary in sarasota, fl on 01/03/2012
    Verified Purchase

    It seems to have done the trick - finally!! No more rodent mites!!

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Most Helpful Q&A's

01/21/2013 Stacia from Kailua Kona

QWhat is the mixing ratio for fleas, in a 2 gal. sprayer, talstar P and Nygurard IGR?
what is the mixing ratio in a 2 gal sprayer for fleas mainly(roaches,centipedes,spiders(black widow,cane spider) problem using Talstar P and Nyguard IGR? I dont understand the mixing instructions on Nyguard IGR. Please help.

AIf you want to mix up two gallons of Talstar/Nyguard you will need to add 2 fl oz of Talstar and 6ml of Nyguard in 2 gallons of water and you will need to spray this over a 2,000 sq ft area. Please note that Talstar cannot be broadcast sprayed over carpets and furniture indoors.

18 of 19 people found this answer helpful.
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11/18/2011 Dan from Jupiter, Florida

QI'm using Onslaught to control ticks. I'm thinking I should add an IGR. Is NyGuard IGR a good choice?
Onslaught's Technical Bulletin recommends NyGuard IGR for a tank mix IGR, but NyGuard's label doesn't list ticks.

ANyguard IGR does indeed list ticks on the product and Nyguard IGR would be a great choice for tick control when mixed with Onslaught.

16 of 17 people found this answer helpful.
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01/23/2010 Judy

QIs NyGuard IGR safe to use in a vegetable garden?
It looks like that is where the fleas have made there home. If not, what can be used to treat the soil in an edible garden?

ANyguard IGR is not labeled to be used on a edible vegetable garden.  However, we do have a product called Malathion 57% which is labeled for gardens and will treat fleas.

12 of 12 people found this answer helpful.
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05/02/2013 Jay from Harrisburg Pa

QIs Nyguard better or just more concentrated than Archer IGR? I see they have the same active ingredient.
Which, in your opinion is more a effective IGR?

AArcher Igr and Nyguard Igr are both very effective IGRs. The biggest differences between the two is the ability to hold up to sunlight outdoors. Archer is photostable for 14 days where as the NyGuard is photostable for 4-6 months. NyGuard also has a wider range of pests that are covered by its ability to sterilize and inhibit the reproductive cycles.

11 of 13 people found this answer helpful.
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04/03/2011 Kyle

QHow often can I spray Onslaught and Nyguard IGR together for bird mites?
I'm thinking about ordering Onslaught to combine with NyGuard for a bird mite infestation. I realize that NyGuard isn't approved for bird mites, but I've heard success from others with this problem. I'm wondering how often this combination be used? Also, I've already used the Precor IGR, and I'm worried about using another IGR on top of it. Thanks for your response.

AWe have had several customers tell us that they have successfully used Onslaught and NyGuard together for bird mite control. Unfortunately because neither product is actually labeled for bird mites, we can not give you a definitive re-treatment time. We can say that both products do allow re-treatments after 14 days if you see renewed insect activity indoors.  There should be no problem using NyGuard IGR in a home where you have previously used Precor IGR.

8 of 10 people found this answer helpful.
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Most Recent Customer Questions

01/04/2016 Harlan from Phoenix, Az

QIf I'm using Nyguard mixed with Onslaught, Onslaught Fastcap, or Cykick, would I use the same label mixing directions as I would with water?


The amount of Nyguard IGR is the same regardless of which insecticide you are mixing with it. The mixing ratio is 3 ml of Nyguard per gallon of water.

3 of 3 people found this answer helpful.
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09/16/2015 Mandy from Victoria Tx

QHow long do we have to wait before entering house after NyGuard IGR application?
We just sprayed the inside of our house with nyguard and I was wondering how long do we have to wait before we can go inside? I have a 11 month old who is still crawling. Is there anything I need to do to make it safe for him?


You can re enter after the NyGuard IGR treated area has dried. Normally about 2 hours. Like with most insecticides when applied per label it is safe for children and pets to be around after it dried.

6 of 6 people found this answer helpful.
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09/10/2015 Andrea from Pendleton, Sc

QDo I need to mix anything with NyGuard IGR to kill adult fleas in my home?


NyGuard IGR should be mixed with a liquid concentrate such as Onslaught that can be applied indoors for eradicating the fleas. You can mix the two products together with water and apply once every two weeks (minimum of 2 applications). Please take a few moments to review our treatment article on How to Get Rid of Fleas. Please let us know if you need anything else.

4 of 4 people found this answer helpful.
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09/04/2014 Terry from Houston, Tx

QTrying to kill fleas in a large yard 1.5 Acre.
I have been trying to kill fleas in my customers yard for a year now. I have use regular Talstar and now twice used the new stronger version. I have also put down granular Bifen down as well. It takes about 200 gallons to spray his yard. Any suggestions?

ATalstar is a great product to control fleas outdoors. It sounds though, that you are missing one key component. The Insect growth regulator to stop the reproduction cycle. We would recommend to mix Nyguard in the with the Talstar and water.

2 of 2 people found this answer helpful.
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04/24/2014 Kathrin from San Antonio, Tx

QHow soon can I water after using NyGuard around my yard?

AYou want to wait at least 6 hours after applying NyGuard IGR to water your lawn.

3 of 3 people found this answer helpful.
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11/03/2013 Matt from Arden, Nc

QWill washing my walls and cleaning my carpet nullify the effects of Nylar?
I applied Nylar to my carpet and the walls in my home a few weeks ago. It's supposed to be effective against fleas for 7 months. Does that mean I shouldn't wash my walls or clean my carpets for 7 months? Will washing and cleaning nullify the effects of Nylar and other insecticides?

AYes, steam cleaning, washing or using any type of cleaning agent on a surface you have sprayed the product on will pull the product up and break the residual down. If treating for fleas, you should be spraying once every 2 weeks with an insecticide and IGR to control the population until its gone. In between sprays you should be vacuuming daily to help pull up any dead fleas, stimulate flea eggs to hatch and suck up an debris they leave behind. Once the flea infestation is gone you can wash the carpets and walls if you need to, but it will degrade the product on the surface.

2 of 2 people found this answer helpful.
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08/03/2013 Brian from Oregon

QDoes Nyguard transfer to other insects through touch?
Would Nyguard make it from an ant outside the nest and transfer it inside the nest? Also, can Nyguard be tank mixed with Arilon? If so, at what rate?

AYes the NyGuard IGR does transfer from insect to insect through touch and grooming habits so it would be carried back to the nest. NyGuard IGR, as well as all other IGRs, can be tank mixed with any insecticide to make application simpler and will not change the effects of either product. Please let us know if you have any other questions.

3 of 3 people found this answer helpful.
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05/12/2013 Jim from Vancouver Bc

QWhat is the mixing ratio of Onslaught and Nyguard IGR for use inside a house infested with bird mites?
wanted to use onslaught insecticide with nyguard IGR inside the house infested with birdmites and wanted to know mixing ratio (for 2 gallons of water), will steifab help for disinfecting furniture?

AYou would mix 1 ounce of Onslaught and 4 ml of NyGuard IGR to each gallon of water you use. So for 2 gallons of mixture you would need 2 ounces of Onslaught and 8 ml of NyGuard IGR. Sterifab is a great contact killer and disinfectant for all surfaces inside the home including furniture, bedding, rugs etc. For helpful tips for controlling bird mites, please reference our article on How To Get Rid of Bird Mites. Or Rodent and Bird Mites in the Home.

4 of 5 people found this answer helpful.
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05/06/2013 Kevin from United States

QIs there a more cost efficient product other than Nyguard as an IGR?
It takes 15-20 gallons to treat around the farm every three (3) weeks. At .4 mL per gallon of water, it would take 60-80 mL. This would cost between $250.00-$350.00 just for the IGR.

ANyguard would actually be your most cost efficient product as it only needs to be applied once every 5 months outdoors. It has the longest residual outdoors to sunlight and rain over all other IGR's which only hold up about 14 days.

5 of 6 people found this answer helpful.
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12/27/2010 Richard

QWill NyGuard work for scorpions?
I was told a local pest control company uses insect growth regulators for scorpions. Just wondering if this product will work for the control of scorpions? Thanks.

ANyguard is not labeled for scorpions. This could mean that the manufacturer has not tested this product for scorpions or that they have tested it for scorpions and felt that it was not effective for that application. We would not depend on Nyguard to be effective for scorpions.

3 of 3 people found this answer helpful.
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