Mosquito Dunks - package of 6
One of the most effective larvae killers we've found! It's active ingredient, BTI (Bacillus thuringiensis subspecies israaelenses) kills mosquito, black fly and thrip larvae for 30 days or more, avoiding annoying mature insects. For outdoor use in standing water situations not involving pollinating plants, like rain barrels or gutters.
While floating they slowly release a long term biological larvacide killing the larvae before they hatch into adults. Use one dunk per 100 square feet of water surface.
For indoor gardening use, Mosquito Dunks are perfect for eliminating the new variety of thrips plaguing the US as this particular bacteria eats anything in a larval stage. It may take a couple of weeks, but it does work.
Hydroponics Application: Place an appropriate portion of a Mosquito Dunk into a nylon sock (helps prevent solid debris) and drop into reservoir. If your infestation is overwhelming, after 24 hours, knead the Dunk slightly to help intensify bacteria saturation - this will shorten the lifespan of the Dunk.
Soil and Soilless Plants: Put a Mosquito Dunk into a nylon sock and soak in water for a few days - Use 1/2 of the innoculated water to thoroughly water plants. Refill container with water and continue to soak same Dunk and repeat watering process. Replace Dunk after 30 days if needed.
Comes in package of 6 Mosquito Dunks. Alternate wetting and drying will not reduce it's effectiveness. Disks may be broken into smaller pieces or secured within nylon sock to avoid being washed away.
We recommend using products that contain the ingredient BT indoors only (not outdoors), and that the user should wear protective gear while applying any product that contains BT- such as a breathing apparatus and tyvek coveralls. We're not taking any position on the use of BT at this time, but if you have any interest in finding out more about BT, just punch it into a search engine and you'll have plenty of information at your fingertips.