NyGuard IGR


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4.4 Rating: 4.4

27 Reviews | 38 Q&A 


  Size/Description Price/Ea. Qty  
NyGuard IGR bottle (140 ml)

Buy 1: $49.00 each

Buy 2 or more: $48.50 each

Buy 5 or more: $48.19 each

Buy 10 or more: $47.83 each

Total Price: $0.00

Availability: Normally ships in 1 business day.
For large order quotes, please call us at 1-866-581-7378.

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.

Active Ingredient: Pyridine 10%
Target pests: Fleas, Stored Product Pests, listed Roaches (German, Asian, and Brown-banded, Crickets, Litter Beetles, and Flying Insects
For use in: Inside and out, commercial and residential.
Pet safe: Yes, when used as directed.
Yield: 10 to 27 gallons (depending on dilution and targeted pest; see dilution tables on product label)
Manufactured By: MGK (UPC: 848920000225)

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   21
4 stars   3
3 stars   0
2 stars   0
1 star   3

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Average Customer Rating
4.4 star rating (27 reviews)

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Most Helpful Customer Reviews
  • 26 of 27 people found this review helpful:

    5 of 5 Stars  Sprayed for fleas got prehatched mosquito's
    By Norma in St. Augustine, Florida on July 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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  • 21 of 22 people found this review helpful:

    5 of 5 Stars  This Product Works!!!!
    By Marianne in Roswell, GA on June 7, 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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  • 17 of 19 people found this review helpful:

    5 of 5 Stars  A true KNOCKOUT
    By David on September 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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  • 15 of 15 people found this review helpful:

    5 of 5 Stars  I am blown away!
    By John in Baxter, Tennessee on July 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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  • 10 of 11 people found this review helpful:

    5 of 5 Stars  Excellent product
    By Li in Saint Paul on May 8, 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
  • 5 of 5 Stars  A great product from a great company.
    By Norma in Saint Augustine, Florida on February 18, 2015
    Verified Purchase

    I can thank you for making it possible to go out in my yard now. The mosquitoes were horrible. We were actually using it for fleas, but it kept mosquitoes from hatching too. For the first time in 24 years I am not being eaten alive when I go outside.

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  • 0 of 2 people found this review helpful:

    1 of 5 Stars  Unhappy with results
    By Richard in 29 Palms, CA on December 1, 2014
    Verified Purchase

    Nyguard did NOTHING to eliminate the pest problem we have even though I followed directions COMPLETELY! I even tried to reapply a second treatment two days after the first, our pests seemed to think it was just a nice shower for them! Very disappointed is all I can say!

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  • 0 of 1 people found this review helpful:

    5 of 5 Stars  It worked!
    By Issa in Ohio on December 1, 2014
    Verified Purchase

    After three weeks of non-stop vacuuming, repeatedly steaming carpets (every other day), and using every spray, powder or flea bomb on available at mass retailers, I finally bought stronger pesticides. I used this in combo with D-Fense SC and we had noticeable results with the first treatment. I did have to retreat with both products a week later, but our infestation was pretty bad - we actually had one of our cats die due to the anemia caused by the blood loss from her flea bites. I wish we'd done this before my son lost his pet.

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  • 5 of 5 Stars  NYGUARD
    By John in baxter tn on November 7, 2014
    Verified Purchase

    ~......THIS STUFF WORKS GREAT......~ what more can I say?

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  • 3 of 3 people found this review helpful:

    5 of 5 Stars  Great for fleas
    By James in Merced ca. on August 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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  • 1 of 2 people found this review helpful:

    1 of 5 Stars  not as good as they claim
    By Darla in TX on August 6, 2014

    first week noticed young fleas then it seemed to not work at all!!!!

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  • 5 of 5 Stars  Ticks
    By Kathy in Palmetto, Fl on July 30, 2014
    Verified Purchase

    This product is a must have when fighting infestations. Your company is fast and reliable and the prices are exceptionally good. Ticks are just hard pests to get rid of, but this product is helping.

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  • 0 of 7 people found this review helpful:

    4 of 5 Stars  NyGuard IGR
    By Derrell in Jacksonville , Fl on July 26, 2014
    Verified Purchase

    I have just started using this so I can not really say it works yet . I should know something soon because I sprayed my own home .

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  • 0 of 3 people found this review helpful:

    4 of 5 Stars  So far so good
    By Jaime in Gainesville on July 9, 2014
    Verified Purchase

    Might be a little early to tell, I just sprayed a few days ago. It was easy to mix (measure out with bottle)

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  • 0 of 16 people found this review helpful:

    5 of 5 Stars  disappointed
    By R. in Napa, Ca on June 11, 2014
    Verified Purchase

    Didn't even get a chance to use this product. Our car was broken into, this product was stolen, among other things, before having a chance to use it. All our hopes of success were riding on this :(

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Most Helpful Q&A's

November 18, 2011 Dan from Jupiter, Florida asked:

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.

14 of 15 people found this answer helpful.
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January 21, 2013 Stacia from Kailua Kona asked:

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.

10 of 11 people found this answer helpful.
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January 23, 2010 Judy asked:

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.

9 of 9 people found this answer helpful.
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April 3, 2011 Kyle asked:

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.

6 of 8 people found this answer helpful.
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April 24, 2014 Kathrin from San Antonio, Tx asked:

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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Most Recent Customer Questions

November 18, 2014 Jose asked:

QWhat is the mixing ratio for German roaches in a 1 gal. sprayer of Cyper WP and Nyguard IGR?

A You will mix 3 mL of Nyguard IGR and depending on severity of the issue, you will mix 1-2 scoops of Cyper WP per gallon of water.

2 of 3 people found this answer helpful.
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November 5, 2014 Ron from Alpine, Ca. asked:

QWhat IGR do you sell to control flies inside homes? What is the cost?

A Nyguard IGR is an excellent insect growth regulator that is labeled to control flies, as well as various other pests. The cost of Nyguard IGR is $49.00 for one 140 mL bottle.

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October 30, 2014 Michael from Jacksonville Arkansas asked:

QWhat is the shelf life if opened, but still in its original container?
Also I see it says it will last up to seven months indoors but how long will it last outside in direct sunlight and rain. I currently do not have a problem I will use it as a preventative with talstar. I was thinking 12ml per gallon ever three months. Thank you.

A Nyguard IGR has a 3-5 year shelf life as long as it is stored at room temperatures. Nyguard IGR 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.

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September 13, 2014 Lori from Waterloo, Wi asked:

QIf used alone, is Nyguard safe to spray (where horses graze) in a pasture?
It has not been enough for me to treat the areas outside the pastures. Gnats, and mosquitos are bad, and in the grass, which is not terribly long but can't be cut as short as the lawn as I want to promote good grazing grass. I'd like some recommendations for natural control (IGR's and BTI if they would be safe for pasture). Essentria would be too costly long term. Thank you!


No, Nyguard IGR is not labeled to be used on pastures where animals graze.

For mosquitos and gnats, we would recommend focusing on the trees and/or water sources in the area. Do not spray the grazing area. Put BTI mosquito dunks in the water sources. Horses can still drink from these areas that have been treated with the mosquito dunks. For spraying, we would recommend using EcoVia. It is a natural product that can be sprayed on trees, bushes, shrubs, etc. It is not labeled to be sprayed on any type of grazing area. Please let us know if you have any additional questions.

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September 4, 2014 Terry from Houston, Tx asked:

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?

A Talstar 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.

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September 2, 2014 Mary from Phoenix asked:

QI live in AZ and need to spray the yard for fleas. Will anything work in this heat?
Sprayed Talstar P in yard and it dried in seconds. Do I need NyGuard with the Talstar p?

A We highly recommend using an Insect Growth Regulator when doing outdoor treatment For  fleas. The best IGR to use outside because it does not breakdown easily in direct sunlight is Archer IGR.  In a 1 gallon pump sprayer, mix 1 fl oz of Archer IGR with 1 fl oz of Talstar P with 1 gallon of water. Apply the solution over a 1,000 sq ft area.  Water the yard to ensure the solution gets into the thatch layer where the Flea Larvae are residing. Archer IGR has been known to last 7 months outside, and Talstar P needs to be applied every 30 days for outside flea control. Please follow the label instructions for applications. We recommend applying the product in early morning or late afternoon.

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August 29, 2014 Jcgl from Ma asked:

QCan I mix Nygar IGR with KLeen Green & Boric Acid
Hi, Can I mix Nygar IGR, Kleen Green & Boric Acid as a good combo against many insect issues inside? Do I need something else? I usually mix 1 quart hot water, 1/2 cup Eaton brand Boric acid, then IGR (how much woudl I add of NYglar?) plus some Kleen green filled to 1 gallon in hand sprayer. Thanks

A Although, we do not see why you would not be able to mix Nylar in with Kleen Green Boric acid, we can say for sure. Please contact the manufacturer of Kleen Green to make sure Nylar will not counteract the effectiveness.

1 of 1 people found this answer helpful.
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August 1, 2014 Bill from Texas asked:

QCan Nyguard be mixed with Demand CS?
I am spraying a barn with a large infestation of spiders, ticks, flies, etc, with a one gallon B&G sprayer. Can I mix Nyguard with Demand CS for the best knockdown and control?


Yes, Nyguard IGR can be mixed with Demand CS. However, Nyguard IGR is an insect growth regulator. It is like a birth control for certain pests. It does not help with the knockdown of the pests. You will use 1 fl. oz. of Nyguard IGR with a gallon of water. For a severe infestation, you will use 0.8 fl. oz. of Demand CS.

If you are looking for a product to get a quicker knockdown, we would recommend ExciteR Pyrethrin Concentrate. ExciteR Insecticide with piperonyl butoxide (PBO) was designed with a pyrethroid pesticide to amplify the efficacy on pest insects.

Please let us know if you have any additional questions.

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July 25, 2014 Edward from Apache Junction Az. asked:

QCan I mix 2-[methyl-2-(4-phenoxyphenoxy) ethoxy] Pyridine with Cypermethrin concentrate for later use?
I want to store and use these concentrates with a percentage of both for german cockroaches to get them and the eggs. The mix seems to work well, can they be mixed and stored together? I like the ml system of the NyGuard IGR container. I purchased almost all my pesticides from Do My Own Pest Control. I made a quick purchase of the Cypermethrin, I forgot to order a fast knock down on my last order. Just thought I'd check to be sure I don't get a bad reaction storing these chemical concentrates in the same container.

A Products containing Cypermethrin and Pyridine are meant to be stored in their original containers only and should not be mixed together.  The dilution rates are different for the two chemicals as well so you would not get an accurate measurement using one bottle for both products.  We would not advise that you mix them and store them together.  Once the products are mixed with water, also be sure to use within 24 hours.

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July 22, 2014 Joe from Naperville, Il asked:

QHow can I make Cyonara and Bifen I/t more effective against Mosquitoes?
I used a mosquito service which worked in the beginning of last year. I then purchased cyronara and bifen I/t from you and Mosquitos are still attacking. What other options do you suggest? I bought mosquito barrier to try. Should I up the dose usage? This is in the Chicagoland area where it's been raining a lot. Also we back up to a forest preserve. Please help!

A There really is  no need to mix Cyonara and Bifen together for Mosquitoes. We would recommend to mix Nyguard IGR with Bifen or Cyonara. This product will break even the toughest insect's reproductive cycle to stop future infestations. The rain could be washing the Mosquito barrier away. It could also prevent the mosquitoes from coming in contact with the Insecticide.

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