BTI Mosquito Dunks

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5 out of 5 stars Rating: 4.8

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BTI Mosquito Dunks pack of 20 $21.50
BTI Mosquito Dunks - CASE (100 dunks)BTI Mosquito Dunks - CASE (100 dunks) case (100 dunks each)

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BTI Mosquito Dunks
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BTI Mosquito Briquets are a sustained-release larvicide that conveniently floats right on the water surface. These briquets can be used in virtually any standing water site where mosquito larvae grow. As the briquets float, BTI (or bacillus thuringiensis israelensis, a natural mosquito-killing biocontrol agent) is slowly released at the water’s surface and gradually settles in the water where it is consumed mosquito larvae. Bti kills mosquito larvae before they are able to grow into mature, biting adults, eventually controlling the mosquito population. Additionally, the toxin will continue to be released into the water for a period of 30 days or more, providing continuous kill. Each briquet will effectively treat up to 100 square feet of surface water regardless of depth.




Pesky mosquitoes love to live and breed in damp and wet areas where there is little or a lot of standing water, such as conatinerized ponds, flower pots, flooded basements roof gutters and old car tires.  If left undisrupted in these natural habitats, mosquito populations will continue to thrive. To address this problem, Summit Chemical has created Bti Mosquito Briquets, a sustained-release larvicide that conveniently floats right on the water surface. These briquets can be used in virtually any standing water site where mosquito larvae grow. As the briquets float, Bti (or bacillus thuringiensis israelensis, a natural mosquito-killing biocontrol agent) is slowly released at the water’s surface and gradually settles in the water where it is consumed by mosquito larvae. Bti kills both the mosquito larvae before they are able to grow into mature, biting adults. Additionally, the toxin will continue to be released into the water for a period of 30 days or more, providing continuous kill. Each briquet will effectively treat up to 100 square feet of surface water regardless of depth. For smaller surfaces, use ¼ or ½ briquet as directed on the product label. Alternate wetting and drying of this product will not reduce its effectiveness, so each briquette may be used and reused. Unused briquets will remain effective indefinitely. To prevent dunks from being washed away, anchor them using a string tied through the center hole, or they can be staked in place. Mosquito Briquets contain no poisonous chemicals and are harmless to other living things. May be used as either a pre- or post-hatch treatment.


Directions for Use:
These briquets/dunks may be used in all types of mosquito breeding areas. To prevent briquets/dunks from being flushed out of certain treatment sites, they can be anchored using string tied through the hole in the center or staked in place.

Pre-flood treatment. If the briquets/dunks are applied to dry areas listed on the label which are known or suspected to become breeding sites when flooded, such as abandoned swimming pools, the briquets will float to the surface when flooding occurs and start releasing the active Bti material. Alternate wetting and drying will not reduce their effectiveness.


APPLICATION RATES

Mosquito Larvae:
Flooded larvae breeding sites: Use one (1) Summit B.t.i. BRIQUET/DUNKS for up to 100 sq. ft. of surface area, regardless of depth. In water with a high organic content, such as sewage disposal systems or waste lagoons, the application rate may have to be increased to as much as four (4) times the normal dosage based upon evaluation by the user.

When larval populations are high, aquatic vegetation dense, or the water highly polluted at the time of briquet/dunks use, pre-treatment with SUMMIT MOSQUITO BITS® is recommended. The briquet/dunks will then suppress larval development for up to 30 days or more. Some larvae which hatch after briquet/dunks application may partially develop before dying. Allow a minimum of 48 hours for their control.

Pre-Flood treatment: Apply one (1 ) Summit B.t.i. BRIQUET/DUNKS to each 100 sq. ft. of dry bed surface which is known or suspected breeding site when flooded.

Evaporative Coolers: Apply one (1) Summit B.t.i. BRIQUET/DUNKS to each 100 sq. ft. of Cooler box or for smaller Coolers refer to the table below for application rate.

SAFE FOR USE IN FISH HABITATS

Outdoor Use around the Household to kill Mosquito Larvae: Summit B.t.i. BRIQUETS/DUNKS can be broken into portions for use in many outdoor applications near the household, such as standing water in bird baths, old automobile tires, rain barrels, abandoned or unused swimming pools (particularly above ground types), ditches, tree holes, roof gutters for collecting rainwater, flower pots, animal watering troughs or any other locations near the household where water collects and remains for periods of time. Summit B.t.i. BRIQUETS/DUNKS can be broken and used as shown in the following table, the amount dependent upon the surface area of water in the treatment site. Mosquito Dunks / Bti Briquets may also be used in any containerized standing water found near the home.


Preflood treatment around the Household: Apply Summit B.t.i. BRIQUETS/DUNKS to any dry surface listed on the label which is known to become flooded after a rain. Use the correct amount in accordance with the above dosage table.

INDOOR USE: For use in areas that collect water from time to time areas such as elevator shafts, basements that flood, sump pumps and any drainage areas within buildings. Use the correct amount in accordance with the above dosage table.

Waste WaterTreatment Plants: Place Summit B.t.i. BRIQUETS/DUNKS in a perforated basket, such as a minnow bait basket, and suspend the basket in the waste water stream before the water enters the trickling filter. Keep basket continuously filled with Briquets/Dunks to ensure a steady flow of Bti into the filter. The number of Briquets/Dunks needed for continuous, effective treatment in each facility will be dependent upon the volume and flow rate of the stream. This will have to be determined by the user.

Rating Snapshot

5 stars   40
4 stars   9
3 stars   2
2 stars   0
1 star   0

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Most Helpful Customer Reviews
  • 16 of 18 people found this review helpful:

    4 of 5 stars  Mosquito Dunks Work for Our Large Pastures
    By Donna in Mesa, Az on 09/05/2010

    We purchased 100 mosquito dunks for a horrible mosquito problem we had in our pastures. We didn't want anything poisonous for animals, but we needed something to get rid of them. Since our last irrigation, they have been cut in half and we hope with another go around of it, that we can diminish them down even further. I like that it kills the larva. The only down side for us is with 5 acres of pasture it would be nice if I could find something less labor intensive, i.e., something I could just drip into our irrigation system without have to walk the whole area placing these donuts out. Great product. Does it come in a concentrated liquid form for irrigation?

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  • 12 of 13 people found this review helpful:

    5 of 5 stars  Control those mosquitoes
    By Ona in Lakemont, GA on 05/03/2010
    Verified Purchase

    These are the best way to control mosquitoes in open rain barrels. We have used them for years but now that we have 5 barrels had to have a better price then at the box stores. Delighted for find them on line for 1/2 the price we had previously paid. We received them very quickly and have them in all the barrels at the present time.

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  • 11 of 11 people found this review helpful:

    5 of 5 stars  Mosquito Dunks
    By Leslie in Surfside, Potrero, Gste, Costa Rica on 06/30/2010

    I can't find dunks in Costa Rica, where I have a second home. Mosquitos down there can carry dengue and malaria. Yet preserving the environment for the great numbers of living things down there requires using something organic and natural. I put a dunk in my gray water drains once a month. Sometimes I drop one down the street in the rain culvert that is always damp. Within a few days there is a dramatic reduction in the numbers of mosquitos at my home. The dunks work GREAT!

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  • 7 of 14 people found this review helpful:

    3 of 5 stars  Surprised by insecticide in this biological product.
    By Joe in O.P, KS on 04/26/2012
    Verified Purchase

    I bought this product because it said it is safe. I may have read the description wrong but I thought that there would be no harmful chemicals in this product. That was what sold me with this product since my dog and little girl use the backyard where the dunks have been applied. To my surprise on the back of the packaging it says to not breathe in the dust, get on your skin, or in your eyes because of the chemicals in the product. I do not believe this product is just a biological control as described. I am not saying it is a bad product, it is working, you just get a few extra ingredients than what you pay for.

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  • 7 of 7 people found this review helpful:

    4 of 5 stars  Night time's pond
    By Roger in Levering, MI on 06/27/2011
    Verified Purchase

    Works well, but for large ponds as mine, buy 2 of the 20 pk. I also placed around home and one in my garage.

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Most Recent Customer Reviews
  • 5 of 5 stars  Dunks
    By Deb in Ontonagon on 09/28/2016

    I order several cases of these a yr. They sure make a huge difference in the amount of mosquitos we get, lots less & we have lots of standing water/small ponds & wetlands on our property near our home. Before the yrs. of dunks, there were days & evenings we couldn't go outside, they were that bad!

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  • 4 of 5 stars  Dunks to rid mosquitos
    By Gwyneth in Oklahoma City, OK on 08/29/2016

    I bought these dunks for my french drains. Easy to use

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  • 5 of 5 stars  BTI Mosquito Dunks
    By Katie in Wiscasset, Maine on 07/21/2016

    This site had the best price of the several that I searched. The Mosquito Dunks were recommended to me by our exterminator (he comes annually to spray for ants) because he told me he saw mosquito larvae in a rain barrel we have, and this was the product he recommended. They work fine as far as my limited knowledge goes. They disintegrate over time (some weeks), so you have to keep an eye on them, for replenishing.

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  • 5 of 5 stars  birth control 4 skeeters
    By Judy in Naples, FL on 07/18/2016

    These are the only things I can put in my rain barrels to keep the skeeters from breeding. The water is still okay for my plants, too. I live in SW Florida and we have lots of rain and mosquitoes.

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  • 5 of 5 stars  Mosquito Dunks
    By Bebe in Texas on 07/15/2016

    These are working as great as the ones I was buying at the local store but at a great savings.

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  • 5 of 5 stars  Mosquito Dunks
    By Bebe in Texas on 07/15/2016

    These are working as great as the ones I was buying at the local store but at a great savings.

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  • 4 of 5 stars  dunks vs. zita
    By B in Martinez, Georgia on 07/14/2016

    I have about 6 feet of standing water in an old closed pool. I was worried about mosquitoes and their nasty viruses. After asking my local pool company about a mosquito repellent, they acted like I was crazy and said there was no such thing. My son in law had told me there was a product used after Katrina in standing water to kill mosquitoes. I did a little research and found this web site. I have no way of judging if the product is working because it is a growth inhibitor but I give thumbs up to the company. They were very easy to order from and prompt in delivery. The dunks themselves are hard cakes that you just toss in the water. It seems to be a good purchase. BTW, I called the pool company and told them about the product.

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  • 5 of 5 stars  Excellent product
    By Walter in Kingstree SC on 07/12/2016

    Relief!! The mosquitos were driving us out!! Your product allowed us to enjoy our house again

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  • 5 of 5 stars  Good Purchase
    By Anthony in Cleburne tx on 06/29/2016

    Fast delivery & product has worked so far!!

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  • 5 of 5 stars  So far, so good
    By Brad in Kanarraville, UT on 06/27/2016

    We have a huge pond right out our front door. 11,500 sq ft. We have thousands of koi in our pond so we were afraid to try the dunks but with mosquitoes eating us alive we knew we had to take a leap of faith. I put 100 dunks in a week ago and as our title says, so far so good!! I will be ordering them again in a month or so. We are determined to take our yard back!!

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Most Helpful Q&A's

02/26/2010 Michael

QWhat is the shelf life of BTI Mosquito Dunks?
My agency has 7 boxes of BTI Mosquito dunks and I could find no date of expiration. Is there a limit on the length of time they can be stored before they are no longer effective?

ABTI Mosquito Dunks should be used within 2 years of the date of purchase. It is also important to store BTI Mosquito dunks out of direct sunlight and heat so that the product will not degrade.

32 of 33 people found this answer helpful.
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03/26/2012 Steve from Milwaukee, Wi

QAre BTI Mosquito Dunks safe to use in pools?
I set up a small pool for my children in the summer. Are these safe to put in the pool with them - specifically if they accidentally drink some of the water or get it in their eyes?

AAccording to Summit Chemical the manufacturer of the Mosquito Dunks, you can use the dunks directly in wading pools and they will not harm your children. These dunks will float on top of the water for several weeks so we would suggest that you take the dunks out of the pool while the children are in the water so they will not play with them.

24 of 25 people found this answer helpful.
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06/12/2013 Kathie from Baltimore, Md

QWill BTI Mosquito Dunks hurt my wildbirds drinking out of a bird bath that has been treated?
I want to treat my birdbaths but I don't want to do anything to harm my wild birds.

AIt will not harm the birds or any other animal that drinks from the water. The BTI dunks are designed to be used in rain barrels, horse and animal water troughs and similar areas like bird baths in a homeowners yard.

24 of 24 people found this answer helpful.
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10/05/2010 Jeffrey

QAre BTI Mosquito Dunks safe for use in ponds with fish in it?

AYes, BTI Mosquito Dunks are safe for use around aquatic life and fish in ponds.

16 of 18 people found this answer helpful.
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02/08/2012 Dee from Henderson, Nv

QI have a waterfall, my dog and cat love to drink out of it, will BTI be harmful to them?

ABTI is specifically labeled to be used in animal watering troughs so there should not be any problem with your animals drinking from the waterfall after it has been treated with BTI Mosquito Dunks.

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

05/05/2016 Mary from Saint Louis, Mo

QCan you put the BTI Mosquito Dunks in birdbaths?

A

BTI Mosquito Dunks† are safe for birdbaths, old automobile tires, rain barrels, abandoned or unused swimming pools (particularly above ground types), tree holes, roof gutters for collecting rainwater, flower pots, animal watering troughs, elevator shafts, basements that flood, sump pumps and any drainage areas within buildings.† One briquet treats up tp 100 sq ft of water.

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04/04/2016 Denice from Clay, Mi

QWhat is the best time of year to put BTI Mosquito Dunks in the water?
I live in Michigan. Right now the snow has melted and I have standing water in numerous locations. It usually takes until June to recede. When should I add the dunks?

A

According to Summit Chemical the manufacturer of the Mosquito Dunks, the best time to†use the dunks†is at the beginning of April, and no later than May.†

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11/03/2015 Lenard from West Palm Beach, Fl

QWill BTI Mosquito Dunks harm turtles or birds?

A

No, BTI Mosquito Dunks will not harm turtles or birds. It is safe to use in areas such as ponds and bird baths where birds and turtles would be present.

4 of 4 people found this answer helpful.
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07/03/2015 Tanya from Rapid City Sd

QWill BTI Mosquito Dunks make my dog sick?
My dog drank from the water that I put a dunk in and now he is sick. Did this product do this?

ABTI Mosquito Dunks is labeled to be used in animal water troughs and are not harmful to animals. If your dog is continuing to experience any kind of sickness we recommend contacting your local veterinarian. You may need to refer to the MSDS when speaking with your vet.

1 of 1 people found this answer helpful.
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06/15/2015 Noel from Laramie Wy

QWill the active ingredient in Bti Briquets migrate from a pond to the underground ground water?
If so, then it could contaminate a water well in close proximity to the pond?

AThe BTI Briquets/dunks will not normally migrate anywhere it will simply slowly breakdown until gone in standing water areas where you dont want pest reproduction to occur. If any of the product did get into the water table somehow it would not be a problem as this product does not harm us and can be used in drinking troughs for animals, in ponds with fish being caught for consumption, and in rain barrels where the water is used to water vegetables.

2 of 2 people found this answer helpful.
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05/31/2015 Jason from Ma

QWill BTI Mosquito Dunks affect turtles?

A

BTI Mosquito Dunks are safe for use around aquatic life and fish in ponds so it will be safe if there are turtles in the water also.

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08/20/2014 Arlette from Clayton Nc

QI am having a problem with terminology of the BTI Mosquito Dunks.
The website refers to Mosquito Dunks. The product is sold in pack of 20. Each briquet will effectively treat up to 100 square feet of surface water. I worked out that a pack holds 20 dunks but what is a briquet? I know what it is in French but I doubt that applies here!

AA briquet is a small brick of compressed coal, sawdust, etc. In this case, it is a small brick of Bacillus thuringiensis subspecies israelensis solids, spores and insecticidal toxins. It is just another name for the individual BTI Mosquito Dunks. Please let us know if you have any additional questions.

0 of 1 people found this answer helpful.
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08/09/2014 Catherine

QAre BTI Mosquito Dunks product harmful to honeybees?

ANo, BTI Mosquito Dunks are not harmful to honeybees.

3 of 3 people found this answer helpful.
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07/08/2014 Matt from Hapeville, Ga

QIs it safe to use Mosquito Dunks in water barrels used to water fruits and vegetables

ABTI Dunks are not listed to be used in water barrels you will be applying to edibles. BTI dunks are to be applied to bird baths, old automobile tires, rain barrels, ponds, abandoned or unused swimming pools (particularly above ground types), ditches, tree holes, roof gutters for collecting rainwater, flower pots, animal watering troughs, waste water treatment plants, elevator shafts, basements that flood, sump pumps and any drainage areas within buildings -

2 of 2 people found this answer helpful.
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06/09/2014 Jerry from Grapevine, Tx

QCan I use BTI Mosquito dunks to control mosquitos in French drains?
I have a bad mosquito problem which I think is coming from my French drain system underneath my backyard concrete patio. There are 6 inlets, and it really seems that the problem is coming from the inlets. I have sprayed the rest of the areas with backyard control products that is supposed to last for a few months, and also have a mosquito misting system. The only pesky area is righty at our feet and it drives us crazy! I've used a little bleach in the drain inlets because someone told me that would help... Only worked for a few hours. The drains are those black plastic ribbed type and I'm pretty sure they nearly always have a little standing water in them due to the ribs. What's the best solution? Would crushed up BTI donuts work if I poured a few gallons of water after insertion to have it spread out down the pipes?

A

BTI Mosquito Dunks will be a great choice to apply in french drains for mosquitos. We recommend using Bifen IT and Pivot 10 on the exterior of the home as well as other non-chemical methods for eradication. I have included some great articles below that you might find extremely helpful!

 

Mosquito Articles

1 of 1 people found this answer helpful.
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