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Gnatrol WDG

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List Price: $18.95
Price: $2.89 + $5.49 shipping
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Miracle-Gro AeroGardens
Grow your own plants and herbs 5 times faster than in soil. See Miracle-Gro's full selection of soil-free indoor gardens.

Frequently Bought Together

Gnatrol WDG + Safer Brand 5025 Houseplant Sticky Stakes Insect Trap, 7 Traps + Springstar BioCare Gnat Stix S5333
Price for all three: $19.92

These items are shipped from and sold by different sellers.

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Product Details

  • Shipping Weight: 1.2 pounds (View shipping rates and policies)
  • ASIN: B003E7BGTU
  • Average Customer Review: 3.9 out of 5 stars  See all reviews (229 customer reviews)
  • Amazon Best Sellers Rank: #2,752 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)

Product Description

Repackaged in 1-60gram bottle...NEW FORMULATION Gnatrol WDG Water Dispersible Granule biological larvicide offers the same effective control of fungus gnat larvae that growers expect from Gnatrol, but with added product benefits. Increased shelf life - now 2 years liquid formulation was only 1 year Much more concentrated; less product packaging to carry around and to dispose of Increased convenience and application accuracy Easier to measure and wont leave a residue like the liquid formulation Can be used on vegetables, bulb crops, bedding plants and a wide variety of ornamentals Fungus gnats stop feeding almost immediately after it is digested, and death occurs 24 to 48 hours later OMRI listed Gnatrol WDG is a biological control for fungus gnat larvae. It contains a variety of bacillus thuringiensis bacteria that kills most gnat larvae. Apply as a soil drench or add to the nutrient solution of your growing system. Does not kill adult fungus gnats, but once the larvae is killed, the adults will quickly die off. Can be used up to the day of harvest on all edible plants. Use 0.25 to 3.25 teaspoons 0.9 to 7.3 grams per gallon of water depending on severity of infestation.

Customer Reviews

2 weeks after applying it every 3 days, and I'm gnat free!
Melissa Buss
This product had fake looking packaging and appeared to be a photocopied label of a real one, sealed with tape in a suspicious looking, unprofessional package.
tamily
I found Gnatrol to be very effective at eliminating my fungus gnat infestation.
emilleejoyce

Most Helpful Customer Reviews

93 of 95 people found the following review helpful By Hyoun Kim TOP 100 REVIEWER on October 29, 2010
Verified Purchase
UPDATE 12/1/2011:
So here we are, a year later and I'm updating my review. I changed the rating from 4 stars to 5 stars because this product definitely works and never fails me. Anyone who knows about houseplants will tell you that 90% of the time no matter which brand you choose, you WILL get a bag of potting soil that has fungus gnat larva inside.

Having expanded my houseplant collection over the year, it's a neverending battle as long as you keep using new bags of soil. The last soil I had was probably the worst in terms of fungus gnat infestation (Miracle Gro Moisture Control). The problem with this soil is that it is "Specially formulated to hold up to 25% more water than native soil." What this means is that this soil will stay moist and one of the surefire way to get rid of fungus gnats is to let the soil dry out. So when you put two & two together, you realize that you can't really dry out this potting soil to control the fungus gnats (like I did). And because this potting soil is formulated to stay moist, the fungus gnats kept multiplying forever. Because of this, please do not EVER buy this potting soil unless you're using it for outside plants.

My reinfestation emerged because I started an herb garden in a rectangular flower container and used about half a bag of that terrible soil mentioned in the previous paragraph. Because these were seedlings sprouts that sprouted from seeds, I really couldn't resort to letting the soil dry out because 1) that potting soil is extremely hard to dry out and 2) seedlings need to be watered, else they will die. The reason I didn't use my remaining gnatrol (about 2 tablespoons worth) is because I didn't know how to buy it again.
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38 of 38 people found the following review helpful By raincrowfarm on April 10, 2011
I have an atrium with permanent indoor planters, and when I changed the soil, the fungus gnats came with it--MILLIONS of them. I had PILES of gnats in the corners and in front of windows in the sunroom. I used the gnatrol, and after about a month there are only a scant few gnats left--like about 20 (compared to a million!) This product does work! When I recieved this product I thought I got scammed because what I recieved was such a small container with what looks like instant tea in it. I was relieved to find that this small container lasts quite a long time. When the powder is added to water, it smells like scummy pond water, but well worth getting rid of the gnats! I found the product most effective if I let tap water breathe overnite(let chlorine evaporate) before adding the powder. And sun-warmed water even better--like activating yeast for bread-making.
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32 of 34 people found the following review helpful By L7 on February 14, 2012
Verified Purchase
I bought this last month to combat our fungus gnat problem, we had thousands of these buggers in our house and in our face.
After reading some of these bad reviews here I was skeptical. When I got the baggy in the mail I was leery of something packed in a ziploc bag,
but took care with it and mixed it outside, with a face mask on for extra precaution. Like most insecticides it's better safe than sorry.

Use only NON-chlorinated water...even mild tap water contains chemicals that deactivate the ingredients. The easy way to make sure you have killed the chlorine is to put a large bucket, or container outside in the sun of regular tap water, for a few days. The chemicals in the water will dissipate. I would not used bought spring water or distilled water either, just let the water stand for a few days and it works much better, and much cheaper.

After the water was conditioned outside, I mixed it up in the bucket with several tea spoons, and added it to all the plants in the house. The next few days were touch and go, until the next week and later and NO GNATS! They were gone. It did not harm or even phase the plants either. Here is the proper dosage: Gnatrol(tm)
Preventative/Light Infestation: 1-2 tsp. per gallon H2O
Heavy Infestation: 4-8 tsp. per gallon H2O

So to the people who say it does not work, they are not measuring correctly, or not doing it right. Or they do not have fungus gnats and have some other bug.
You have to get the proper doses, and not use the entire package. I would say to the company, put it in a small plastic jar, just so people feel more secure with it not being in a plastic baggy. Even just a tupperware container, ships safer too, the post office is not very nice to light packages and they get poked or ripped.
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21 of 24 people found the following review helpful By Trudy Rose on September 22, 2011
Verified Purchase
I think I've tried everything now to get rid of fungus gnats. This stuff didn't do much if anything. The yellow stickies caught bunches but barely slowed them. I let the plants dry until nearly dead, I tried teas, spices, soaps, Neem, and everything else I found or heard about. I finally got rid of them by scraping off the top 1" layer of soil and replacing it with sand.
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10 of 10 people found the following review helpful By BoulderSki on July 28, 2012
Verified Purchase
I had a really nasty infestation in my kitchen herb garden and didn't want to spray pesticides on plants located where my food is prepared. I mixed 2 tsp in 1 gallon of water that was de-chlorinated (don't skip the de-chlorination). I applied two times during a one week period (once on Monday and once on Wednesday). By Wednesday I only saw a couple of gnats flying around and by Friday they had completely disappeared. I am now on week 3 with no sign of gnats. This stuff works great, much better than the pyrethrin based pesticides I tried in the past.
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