FenvaStar Plus Esfenvalerate 8.4%


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4.5 out of 5 stars Rating: 4.6

8 Reviews | 10 Q&A


{ $36.45 { $33.50 { $29.90
  Size/Description Price/Ea. Qty
FenvaStar Plus Esfenvalerate 8.4% pint (16 oz)

Buy 1: $36.45 each

Buy 2 or more: $33.50 each

Buy 4 or more: $29.90 each

Total Price: $0.00

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FenvaStar Plus Esfenvalerate 8.4%

FenvaStar Plus Esfenvalerate 8.4% is a low odor pest control product labeled for all major pests. It can be applied from a sprayer, used as a space spray, applied to carpets for fleas, or used in a ULV fogger. FenvaStar Plus can be diluted with oil or water.

Best of all, this product is OK to ship to New York!


GENERAL: Use Fenvastar Plus insecticide to control the pests indicated in the listed areas as a contact spray by mixing either 0.42 fluid ounces of concentrate in 1 gallon of water or oil or 0.83 fluid ounces of concentrate in 1 gallon of water or oil and mix thoroughly before use. One 0.42 fluid ounces of Fenvastar Plus per 1 gallon of water or oil will make a spray containing 0.027% active ingredient, 0.83 fluid ounces per 1 gallon will make a spray containing 0.05% active ingredient. For initial clean out of heavy infestations use 0.83 fluid ounces of concentrate per 1 gallon of spray; for maintenance control or light infestations use 0.42 fluid ounces of concentrate per 1 gallon. When using oil as the diluent, an odorless light petroleum hydrocarbon as defined by CFR Title 21, Sec. 172.884 must be used for all food areas and food related applications. For all applications of contact sprays, use at the rate of one (1) gallon (diluted spray) per 1,000 square feet of surface area.


GENERAL: Use Fenvastar Plus at the rate of 0.83 fluid ounces per 1 gallon of water to control contact on Ants, Cockroaches, Crickets, Sowbugs, Spiders, and Ticks. Use at the rate of one (1) gallon per 1,000 square feet to outside surfaces of buildings, porches, patios, garages and other areas where these pests have been seen or are found.

Avoid soaking young or flowering plants.

All outdoor applications must be limited to spot or crack-and-crevice treatments only, except for the following permitted uses:

  • Treatment to soil or vegetation around structures.
  • Applications to lawns, turf, and or vegetations.
  • Applications to building foundations, up to a maximum height of 3 feet.

Other than applications to building foundations, all outdoor applications to Impervious surfaces such as sidewalks, driveways, patios, porches, and structural surfaces (such as windows, doors, and eaves) are limited to spot and crack-and-crevice applications only.

Rating Snapshot

5 stars   7
4 stars   0
3 stars   0
2 stars   1
1 star   0

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Average Customer Rating
4.5 out of 5 stars (8)

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  • 7 of 9 people found this review helpful:

    2 of 5 stars  The price is right , However..................
    By Ed in Delaware on 08/28/2012

    I started using Fenvastar Plus today and immediately notice the strong odor it gave off. And that was while doing an exterior service. I don't plan on using it on any interior services because of the odor.

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  • 6 of 7 people found this review helpful:

    5 of 5 stars  As good as Conquer at a cheaper price
    By Bryan in Temple, TX on 08/28/2012
    Verified Purchase

    This concentrated form of esfenvalerate is wonderful (.42 oz.s per dose versus Conquer's 1 oz.) It's like getting another bottle for just a few dollars more. You can mix this with oil for fogging/space spraying and Actisol injecting into cracks and crevices. I'll definitely buy this product again in the future.

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Works on Leaf cutter ants
    By Richard in Thomaston, Texas on 10/25/2012
    Verified Purchase

    We have been infested with leaf cutter ants. I have been looking for something that I can control them with and found that FenvaStar Plus Esfenvalerate 8.4% has the ingrediant needed for that. I have a 15 gallon tank with a 12volt pump, I spray the top of the mound to kill the ants on top of the ground and then put the spray wand in the hole and pump about 1/2 gallon of mixture in to get it down to where they are living. I have found that I actually didn't need to pump the product into all of the holes as some of them interconnect under ground. I had an area approx 20 x20 ft that was covered with mounds. It has been 3 weeks since i made the first application. I only have had 4 new mounds appear, but outside of the area. I do not expect to totally get rid of the ants, but I am able to control them. This product also kills Fire ants and Harvester ants. Note, you can't expect the product to work if you don't use enough.

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Fenvastar Rocks
    By Arthur in Toronto Canada on 06/26/2013
    Verified Purchase

    I was greatly impressed with the speedy delivery. The product Fenvastar is truly amazing. I did phone "do my own pest control" and they were most helpful. I will be ordering more product in the near future.

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  • 5 of 5 stars  To kill a cutter ant
    By Terry in Pleasanton, Texas on 08/13/2013
    Verified Purchase

    Pleasantly surprised to have positive results using this product to terminate cutter ants.

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  • 5 of 5 stars  A real knockdown
    By David in NJ on 04/30/2017

    Fenvastar Plus is my personal favorite repellent. It is expensive, and has a medium residual, but it kicks butt on initial treatments. The smell is an issue if your sensitive, I would describe the odor as a paint thinner and walnut oil aroma. I usually don't use it indoors since it is oil based.

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  • 5 of 5 stars  FenvaStar Plus Esfenvalerate 8.4%
    By Kellie in Hedgesville, WV on 07/20/2017

    I liked this product because after just one application, I had no more problems with pests. The measuring for correct application was too easy with the product packaging, just squeeze until you have the correct amount.

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  • 5 of 5 stars  Fenvastar Plus Esfenvalerate
    By Wendy in Red Oak, TX on 08/11/2017

    Fast and accurate service. Haven't been able to use it yet because of days and days of rain. But I liked the fact that it was a higher percentage of the killing agent than Archer and it was less expensive. The Archer has worked well so I expect this to work well, also.

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06/22/2013 Vick from Waco, Tx

QIs this work with bed bugs and how am i dilute this product..?

AYes, Fenvastar Plus is labeled to treat bed bugs. You want to mix at a rate of .83 oz per gallon of water.

3 of 3 people found this answer helpful.
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09/27/2013 John from Phoenix, Az

QHow long does Fenvastar last? What is the residual?

AFenvaStar Plus Esfenvalerate 8.4% will last 3 months indoors and 1-2 months outdoor depending on the season.

2 of 2 people found this answer helpful.
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04/08/2013 Angie from New Haven, Ct

QIs Fenvastar Plus effective on carpet beetles?
Is Fenvastar Plus effective on carpet beetles even though it is not listed on the label? Fenvastar Eco has carpet bugs listed but I notice they have the same ingredients, just the plus has a higher amount of Esfenvalerate.

AWhile Fenvastar Plus will likely work for carpet beetles the product is not specifically labeled for carpet beetle control. Fenvastar EcoCap on the other hand has been tested for and is labeled for carpet beetle control.

1 of 1 people found this answer helpful.
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06/26/2012 Mark from United States

QWhat is the best product to use for earwigs in CT? It seems everything is restricted here.

AFenvastar would be a good choice for you. Fenvastar contains the active ingredient esfenvalerate, is a low odor pest control product and is labeled for all major pests including earwigs.  It can be applied using a hand pump sprayer into all cracks and crevices in woodwork and floors, underneath sinks, areas behind pipes, and in all places where these insects shelter. Fenvastar is safe to use in a home where cats live as long as you follow the product label. Keep cats out of the area while you are applying the product and they can return to the area as soon as it is dry.

1 of 3 people found this answer helpful.
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07/19/2012 Cecil from Long Island, Ny

QCan you mix Fenvastar Plus with Archer?

AAbsolutely,  You can mix Archer IGR with any liquid insecticide with no issues.

1 of 2 people found this answer helpful.
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06/26/2015 Sabrina

QIf you use FenvaStar Plus Esfenvalerate 8.4% with the ULV fogger, when is it safe to return to the home?

AFenvaStar Plus Esfenvalerate 8.4% can be applied in a ULV fogger. You should stay out of the area during dispersement and return only when the fogging is complete and the area has been properly ventilated for a half hour.

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06/04/2013 Travis from St. Cloud, Mn

QOrchard use and harvest interval
Minnesota's extensions program lists Esfenvalerate as good product for home Orchard use. However I dont see information about using this product in that context. What is the time from the last spray till the fruit would be safe for consumption(Harvest interval)? Or is this product not intended for that use?

AWe generally do not recommend using fenvastar Plus in Orchards. Please contact rockwell Labs 866-788-4101 to verify that you can or cannot use this product. You could also use something like Bonide Fruit Tree Spray that is intended for use on fruit tree.

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03/20/2016 Angelique from Andover, Mn

QWill this effectively kill all stages of squash vine borers?
I need something that will kill all life stages of squash vine borers. Will this do that?


No, Fenvastar Plus Esfenvalerate is not labeled for use on any edibles. It is not labeled for squash vine borers.

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08/16/2016 David

QWhere are bees on the label for FenvaStar Plus Esfenvalerate 8.4%?
I use this at work for my company. It works amazing. The one question I have, is why are wasps, hornets, and yellow-jackets not on label?


We are not sure of the exact reason why†FenvaStar Plus Esfenvalerate 8.4%†does not list bees, hornets and yellow jackets on the label as this information is not provided by the manufacturer. †It could be that it was not tested against these pests or that it was and was not found to be very effective against them.

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10/10/2016 Nidal from Washington Township, Nj

QCan Fenvastar Plus Esfenvalerate 8.4% help with camel crickets?
I have a cave cricket in the basment in the garage and i foond it in the house to


While Fenvastar Plus Esfenvalerate 8.4% is labeled for crickets, it is not labeled specifically for camel crickets. We would recommend Niban Granular Bait†.†This is the time of year that they are coming indoors looking for shelter as the weather starts to get cooler. They also love dampness and moisture. Outdoors these crickets hide in cluttered garages, near leaky gutters, underneath decks and in piles of leaves, Clearing away leaves under your desk and around your home, cleaning our your garage, ventilating crawl spaces, cutting back bushes, fixing leaky gutters and making sure your sprinkler is not hitting your house can deter camel crickets from nesting nearby, and ultimately invading your home.†

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