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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.
Product Documents
| 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, if used as directed on Label |
| Yield | 1 briquet treats up to 100 sq ft of water |
| Shipping Weight | 0.80 lbs |
| Manufacturer | Summit Chemical (Mfg. Number: 13821) |
| UPC | 018506001117 |
| EPA Registration | 6218-47 |
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.
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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66 of 72 people found this review helpful
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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63 of 65 people found this review helpful
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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54 of 86 people found this review helpful
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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52 of 53 people found this review helpful
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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37 of 38 people found this review helpful
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?
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195 of 200 people found this answer helpful
No, BTI Mosquito Dunks are not labeled for use in ponds or other bodies of water. Only 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.
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108 of 123 people found this answer helpful
I would like to know if it will be able to fit down a "bee hive" sewer grate.
I am trying to determine relative costs of dunks vs. granules
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?
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125 of 129 people found this answer helpful
I want to treat my birdbaths but I don't want to do anything to harm my wild birds.
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14 of 14 people found this answer helpful
I found a box of these in a house I just bought, I wonder if they are still efective
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2 of 3 people found this answer helpful
Will this product be harmful to my family if I used it in my swimming pool?
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7 of 20 people found this answer helpful
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?
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!
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25 of 29 people found this answer helpful
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99 of 121 people found this answer helpful
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43 of 46 people found this answer helpful
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!
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1 of 2 people found this answer helpful
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21 of 23 people found this answer helpful
BTI Mosquito Dunks
Rating: 4.7 (82 Reviews / 94 Q&A)
