NyGuard IGR

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Average Rating

4.5 out of 5 stars Rating: 4.5

100 Reviews | 146 Q&A

Product Overview

Nyguard IGR concentrate is a new Insect Growth Regulator with a broad label that delivers excellent results. This will break even the toughest insect's reproductive cycle to stop future infestations. 

Features and Specs

Active Ingredient Pyriproxyfen 10%
Target pests Ants, Beetles, Crickets, Fleas, Flies, Fungus Gnats, Midges, Moths, Mosquitoes, Roaches (German, Asian, Brown-banded)
* See label for complete list
For use in Commercial & Residential: Indoors & Outdoors: Apartments, Carports, Decks, Food Processing Plants, Hotels, Kennels, Lawns, Landscaping, Livestock, Patios, Poultry Housing, Restaurants, Schools, Warehouses
* See label for complete list
Application * See label for complete application instructions
Pet safe Yes, if used as directed on Label
Yield 10 to 27 gallons of solution
Formulation Professional Product
Shipping Weight 0.40 lbs
Manufacturer MGK
EPA Registration 1021-1603


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.

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  • 5 of 5 Stars

    Sprayed for fleas got prehatched mosquito's

    By Norma 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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    163 of 169 people found this review helpful

  • 5 of 5 Stars

    I am blown away!

    By John 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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    97 of 99 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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    81 of 83 people found this review helpful

  • 5 of 5 Stars

    This Product Works!!!!

    By Marianne 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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    64 of 72 people found this review helpful

  • 5 of 5 Stars

    Excellent product

    By Li 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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    56 of 62 people found this review helpful

See all 100 customer reviews

Questions & Answers

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Is 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?

Archer 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.

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130 of 137 people found this answer helpful

What is the mixing ratio for fleas, in a 2 gal. sprayer, Talstar P and Nyguard 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.


If 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.

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86 of 96 people found this answer helpful

Is 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.

Nyguard 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.

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64 of 67 people found this answer helpful

I'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.

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

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51 of 53 people found this answer helpful

I want to treat my home with Bifen IT and Nyguard IGR. Can I mix these together? If so, how much of each product would I mix in a gallon of water?

Yes, Bifen IT and NyGuard IGR can be mixed together.  You will mix 1 oz. of Bifen IT and 4-8 mL of Nyguard IGR in one gallon of water. 

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47 of 49 people found this answer helpful

See all 146 customer questions

NyGuard IGR 4.5 out of 5 stars Rating: 4.5 (100 Reviews / 146 Q&A)

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