BTI Mosquito Dunks

5 out of 5 stars 61 Reviews | 62 Q&A

BTI Mosquito Dunks
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Average Rating

5 out of 5 stars Rating: 4.8

61 Reviews | 62 Q&A

Product Overview

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.

Features and Specs

Active Ingredient: Bacillus thuringiensis subspecies israelensis Strain BMP 144 solids, spores and insecticidal toxins 10.31%
Target pests: Mosquitoes and Psychodid Flies, and their larvae
For use in: bird baths, 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
Pet safe: Yes; when used as directed
Yield: 1 briquet treats up to 100 sq ft of water
Shipping Weight: 0.72 lbs
Manufactured By: Summit Chemical
UPC: 018506001117

Details

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.

5 stars   48
4 stars   11
3 stars   2
2 stars   0
1 star   0
  
  • 4 of 5 Stars

    Mosquito Dunks Work for Our Large Pastures

    By Donna 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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    21 of 24 people found this review helpful

  • 5 of 5 Stars

    Control those mosquitoes

    By Ona 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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    14 of 15 people found this review helpful

  • 5 of 5 Stars

    Mosquito Dunks

    By Leslie 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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    13 of 14 people found this review helpful

  • 3 of 5 Stars

    Surprised by insecticide in this biological product.

    By Joe 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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    13 of 24 people found this review helpful

  • 5 of 5 Stars

    Definitely works

    By Tr on 03/27/2015

    I work in the Health Dept for my county. The guys in Environmental Health use these dunks as the main component for their mosquito abatement program. They tell me that the dunks are appropriate organic controls, meaning organic farmers won't lose their organic certification for using these. I have a pond on my property and get clouds of mosquitos if I don't use these dunks. The thing is with these dunks is that you have to use them in a timely manner or a hatch of skeeters will get past you. I found critters like to eat these. So keep an eye out after you dunk them somewhere. If you tossed them somewhere and you still got skeeters, your dunk may have gotten eaten before it could affect the skeeter larvae.

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    9 of 9 people found this review helpful

See all 61 customer reviews

Questions & Answers

Have a question about this product?
  
Q
Will 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.
A
It 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.

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81 of 81 people found this answer helpful

Q
What 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?
A
BTI 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.

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79 of 81 people found this answer helpful

Q
Are 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?
A
According 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.

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47 of 49 people found this answer helpful

Q
Is it safe to use Mosquito Dunks in water barrels used to water fruits and vegetables
A
BTI 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 -

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26 of 33 people found this answer helpful

Q
Are BTI Mosquito Dunks safe for use in ponds with fish in it?
A
Yes, BTI Mosquito Dunks are safe for use around aquatic life and fish in ponds.

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26 of 28 people found this answer helpful

See all 62 customer questions

BTI Mosquito Dunks 5 out of 5 stars Rating: 4.8 (61 Reviews / 62 Q&A)

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