Reviewed by Michael
I recommend this product
5 Stars
good stuff.
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Clarke | SKU:
WDG104
WDG3000 Extra Strength BTI
Rated 4.8 out of 5
Regular price
$50.00
Unit price
WDG3000 Extra Strength BTI - 1/2 lb is backordered and will ship as soon as it is back in stock.
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Quality First
Quality First
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Delivery and Shipping
Delivery and Shipping
Shipping Policy
Shipping is expensive, and it gets more expensive almost every year. We are not going to pretend otherwise. What we can tell you is that we work hard to find the most reliable and affordable way to get your order to you, and we pass along free shipping wherever it makes sense.
Free shipping on any order with two or more items. The one exception is bulk items, meaning the large or heavy products that have to move by freight or oversized parcel. If your cart qualifies, free shipping is applied automatically at checkout.
Why two items and not a dollar amount?
Most stores set free shipping at a dollar threshold. That works when you sell light things like clothing. We don't. We ship soil, amendments, and heavy real goods that are expensive and awkward to move, so a dollar minimum doesn't reflect what shipping actually costs us.
We are a small business with no outside financial backing, and we are not Amazon. We manufacture, pack, and ship everything in house so we can control quality, which means real people picking, boxing, taping, and labeling every order, and that means real jobs. When we ship a single item for free, the only way to cover it is to raise prices across the board, and we would rather not do that. Asking for two or more items on free orders lets us keep prices lower for everyone and keep shipping sustainable. We hate high shipping costs as much as you do, and this is the fairest way we have found to keep them down.
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WDG3000 Extra Strength BTI - 1/2 lb is backordered and will ship as soon as it is back in stock.
Description
Description
Mosquito larvicide for standing water
Bti larvicide for mosquito larvae in standing water
WDG3000 is a concentrated Bti larvicide. Mix it with water and apply it to standing water. EPA Reg. No. 62637-14.
1/2 tspper gallon treats 1,000 sq ft of water
Up to 4.6 acresof water surface per 8 oz bag
43% Bticoncentrated water dispersible granule
3,000 ITU/mgpotency
For standing water sites only. Mix with water and apply as directed on the label. Never apply to treated, finished drinking water reservoirs.
What it is
What WDG3000 is
Bti is short for Bacillus thuringiensis subspecies israelensis. It works on larvae in the water when they eat it. It does not affect adult mosquitoes.
WDG stands for water dispersible granule. It is made by Becker Microbial Products, now part of Clarke, and sold commercially as AquaBac WDG 3000. The other 57% is the carrier that keeps the granules dispersing evenly in the tank.
Where to use it
Ponds and water gardens
Rain barrels
Birdbaths and fountains
Clogged gutters
Ditches and low spots that hold water
Catch basins and retention areas
Also labeled for nuisance aquatic midges in shallow ponds, at a higher rate.
Label
Key label directions
The main label directions, with what each one means in practice.
The label says
What it means
May be applied to any water site, except treated, finished drinking water reservoirs.
Apply it only to water sites. Never apply it to a drinking water supply.
Apply at a rate of 1.75 to 14 ounces per acre in 5 to 100 gallons of water per acre.
Always mix it with water before applying. An acre of water surface takes 1.75 to 14 ounces.
Use the higher rate when late third and early fourth instar larvae predominate.
Older larvae need the higher rate. When larvae are small, the lower rate is enough.
Reapply as necessary to maintain larval control.
There is no fixed interval. Reapply when larvae show up again.
Store in a cool (59 to 86 F), dry place.
Keep the bag sealed, cool and dry.
Rates
How much to mix
Mix the powder into 1 gallon of water, then apply that gallon evenly over 1,000 square feet of water surface. Measure the surface area of the water, not its depth or volume.
| What you are treating | Powder per gallon of water | About |
|---|---|---|
| Mosquito larvae, most standing water | 1.1 to 4.6 grams | 1/2 to 2 1/4 teaspoons |
| Mosquito larvae, polluted water | 4.6 to 9.1 grams | 2 1/4 to 4 1/2 teaspoons |
| Aquatic midges, shallow ponds | 36.4 grams | 6 tablespoons |
- Use the low end when larvae are small. Use the high end when most larvae are large.
- Larger areas: mix 1 gallon for every 1,000 square feet. A 3,000 square foot pond takes 3 gallons.
- Smaller areas: mix a full gallon and apply only the share that matches the area. 100 square feet takes about 13 ounces of the mix.
Teaspoon amounts assume about 2 grams per level teaspoon. Granule density varies, so a gram scale is more accurate. Label rates are 1.75 to 7 oz per acre for most mosquito habitats, 7 to 14 oz per acre for polluted water and 3.5 lb per acre for aquatic midges, mixed in 5 to 100 gallons of water per acre. This mixing guide uses about 44 gallons per acre.
Directions
How to apply
1
Gear up and measure. Wear safety glasses, waterproof gloves, long sleeves and pants, socks and shoes, and an N95 mask while mixing and applying. Measure the powder for 1 gallon of water per 1,000 square feet of water surface.
2
Mix into water with agitation. Fill your sprayer or mix container with water first, start stirring or agitating, then slowly pour the granules in. Keep agitating so they stay dispersed.
3
Apply evenly and recheck. Spray or pour the mix evenly over the water surface. Check the water again over the following days and reapply when larvae return.
FAQ
Common questions
Can I sprinkle the granules straight into the water?
No. The label directs you to mix it into water in a tank with agitation and apply the mix. Dry application is not on the label.
How often do I reapply?
The label says to reapply as necessary to maintain larval control, with no fixed interval. Water that refills or holds runoff will need repeat treatment.
How much does one bag treat?
The 8 oz bag is about 227 grams. At the label's mosquito rates, that covers roughly 1.1 acres of water surface at 7 oz per acre, up to about 4.6 acres at 1.75 oz per acre.
How should I store it?
Sealed, cool, and dry, between 59 and 86 F per the label. When you finish a bag, empty it completely into your mix, then recycle the bag if available or dispose of it in a sanitary landfill.
What if I get it on me?
The label lists it as harmful if inhaled or absorbed through the skin and a moderate eye irritant. If inhaled, move to fresh air. For eyes, rinse with water for 15 to 20 minutes. For skin, remove contaminated clothing and rinse for 15 to 20 minutes. Call a poison control center or doctor for treatment advice, and have the label with you.
Research
Mosquito research
Bti has been used in mosquito control since the late 1970s.
Field use
Bti for mosquito control
A review of Bti in mosquito control programs: habitats, formulations, application methods and the factors that affect results in real water.
Lacey, L.A. (2007). Journal of the American Mosquito Control Association 23: 133 to 163. Read it
How it works
How Bti works
Larvae eat the protein crystals, their alkaline gut activates the toxins, and the toxins break down the gut wall. Several toxins working together is why field resistance has not been reported after decades of use.
Silva-Filha, M.H.N.L. et al. (2021). Toxins 13(8): 523. Open access. Read it
Documents
Label and documents
Questions about this product? Contact our support team or use the chat.
Always read and follow the complete EPA approved product label. It is a violation of Federal law to use this product in a manner inconsistent with its labeling.
Specifications
Specifications
-
Length (in)
-
Width (in)
-
Height (in)
Questions?
We are here to help and our entire staff knows how to grow. Just reach out via chat, email or even phone. We are passionate about growing and want you to succeed.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Based on 128 reviews
95%
of reviewers would recommend this product to a friend
Customer photos and videos
128 Reviews
Reviewed by Samuel O.
Verified Buyer
I recommend this product
Works great
Works just as advertised. Gone by application #3.
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Reviewed by Laura S.
Verified Buyer
I recommend this product
Fungus gnat destroyer !!!
No more fungus gnats
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Reviewed by Mitch
Verified Buyer
I recommend this product
Preventative Excellence, Infestation So/So
I've had an infestation of fungus gnats break out in the past and applying this stuff 3x a week, at the max strength (1tbsp/G) it really struggled to eradicate the gnats completely. It wasn't until I bought and used Nematodes SF where the population was completely gone. However, for brand new bags my routine is pretty simple. I apply 1tsbp per G of water (watering 5-10%) of the soils volume (pairing the WDG3000 with a Quijalla Extract to break up any hydrophobic spots) and letting that sit for 7 days. It took a little to figure out on doses, sometimes the lower application rate didn't completely resolve the gnats from repopulating. Increasing to 1tsbp helped prevent any future break outs. I'll dock a point for not being able to completely eradicate infestations by itself, but 5/5 for preventative maintenance. If you're going to open new bags, I'd recommend this stuff.
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Reviewed by David D.
Verified Buyer
I recommend this product
Pest management
Used 1×, imidietly knocked population down. Little over wk later, released 50 Rove Beetles. Not seen any since.
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Rated 4.8 out of 5
