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Mosquito Dunks for Gnats control, what % of mix

Ok, so those of you that use Mosquito Dunks for Gnat control, what is the % or ratio you use? My plants need a drink today and I would like to try the Mosquito Dunks tonight. Thanks
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2-3 teaspoons / Gallon of water. Grater or crush the mosquito dunk donuts.

Gnatrol @ 37% BTi is 1 teaspoon / gallon for medium infestation.

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1/4 - 1/2 teaspoon makes one gallon for a light infestation.

1 teaspoon per gallon for a medium infestation

3 teaspoons per gallon for a heavy infestation.


Mosquito dunks is 10.3% BTi

<edit> Re apply in 7 to 10 days to break the hatching cycle, also mulch top of the container with dry material to deter egg laying.

Good Luck.

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thanks
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I just toss the whole dunk in the watering can and leave it there.
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to maximize the action of killing, I put a small tub and sit the container inside, so the bottom holes are soaking in the donut water, and I poured on top they tend to run to the bottom, I could not believe how many floated away, dead!

remember they lay their eggs in the top 2 or 3 inches, that is where the more soaking needs to happen.  I did with help of a cooking pot in the stove, so that the water was warm. It is pretty cold here, the excess water went in the pot to warm up for the next one I kept on adding more donut in the next water.   It has been a few days now, and I finally see a break through.  I hang anothe fly trap near the light..and none so far... I am not letting my guards down. 

Did notice a few have wilted completly, (either gnats or too much water) just cannot win, can't i?
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fespo, the attached publication suggests that watering once a week for 8 weeks with a solution of 0.5gms Bti/liter of water works best. They also show less frequent treatments at a higher concentration of Bti is less effective.

Good luck!
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fespo, DWD2,

If you read the above PDF document, the higher concentration of BTi was applied at 3 week intervals, which is outside the reproductive cycle of the fungus gnats, they will be on their second or third generation in that time.

Also The conclusion states that the addition of dry sand at the soil surface does decrease fungus gnat population.

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the sand topping appeared to have reduced numbers of fungus gnats associated with it. The technique warrants further investigation particularly if a method of keeping the toppings drier can be implemented.


Instructions for the use of BTi.
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How does BTI WDG work?
It is not effective against the adult fungus gnat. The gnats (which live for 7 days) lay their eggs in healthy soils and it takes the eggs approximately 4 days to reach the larval stage. It is the larva that causes damage via feeding on plant roots causing wilting and death. The larva eat the BTI becoming infected with the bacteria and die! It may take 3 weekly applications to effectively control oncoming generations of gnats. It is quite common to get new plants that have fungus gnat larva in the soil. New potting soil may often contain the larva. BTI is the safe answer for these situations. We also recommend using yellow or blue colored sticky traps as a monitor to let you know when infestations are starting and as a trap to catch the adults. Some say blue traps work better but the yellow traps work equally well in our experience. Laying the sticky traps in a horizontal position across the container rim will catch a lot more adults as they are more prone to land on a flat surface. You can also set out a jar of wine or cider vinegar to use as an indicator and trap as the gnats will be attracted to the smell, dive in for a drink and drown.
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