Mosquito dunks are excellent at getting rid of larvae. Yet, they’re ineffective when it comes to killing any existing adult mosquitoes. After a few minutes, they will gradually sink down, slowly releasing the Bti. This will also be the time that the larvae will start consuming the bacteria. Mosquito dunks are about two inches in diameter and have a narrow hole in the middle so that you can use a piece of string, wood, or metal to place the dunk where you want it to go.

Homeowners can find BTI-based larvicides at their local garden stores. They’re available as mosquito dunks or granular bits. Most mosquitoes lay their eggs right in the water, which can be even just a small amount such as a low spot in your yard or the water in a bird bath. This low-tech method actually does keep mosquitoes away! Simply run an inexpensive box fan on high when you’re outdoors to keep them out of the space where you’re sitting or entertaining, says Gray. They don’t like to fly in heavy wind, so it will at least send them elsewhere for dinner. Is it okay to use yard foggers to kill mosquitoes?Five different strains of Bti have been registered with the EPA and can be found in 48 pesticide products approved for residential, commercial and agricultural use. How does Bti work? The CDC provides advice on mosquito control at home here and information on the mosquito lifecycle here. The EPA said it is important to follow the label to make sure the Bti product is being used correctly. There are several products that can be used on certain drinking water while others are not intended for drinking water use. Other mosquitos will lay their eggs in close proximity of water, as even the surrounding areas tend to have enough moisture to aid survivals.

I think you can just add some water to freshen it up a bit. Maybe throw in a few more leaves. Make sure there’s enough of the mosquito dunk. Clogged gutters and downspouts are other problem areas, so make sure to clean them regularly. Eliminate low spots in the yard, when possible, and repair drippy outdoor faucets that allow water to pool beneath them. Fill holes in trees, which are another place some species lay eggs. That's a waste of dunk. There are no mosquito eggs in there yet so why put the dunk in early. They don't last forever. The Summit mosquito dunk product is safe in fish habitats as well as animal troughs, which can really help with mosquito control on you ranch or at your farm or cabin. Why is all of this important? Because it explains that these little buggers live a short life and can wreak an awful lot of havoc in 40 days or less.Studies have shown that Bti is effective in reducing mosquito larval populations. It could be effective in controlling mosquitoes carrying Zika, dengue and chikungunya in places like Puerto Rico -- or other areas where the diseases have been identified. These small, donut-shaped pellets are regarded as a biological insecticide by the scientific community.