TreeHelp carries two larvicides made for standing water: Mosquito Dunks, which control larvae for 30 days or more, and Mosquito Bits, which kill existing larvae within 24 hours. Both come in several sizes, from a small pack for one birdbath to bulk quantities for a property with many water features.

What makes a larvae product effective in standing water?

Bti, short for Bacillus thuringiensis israelensis, a microbial larvicide that targets the larval stage of the mosquito. Products built on it treat the water itself, so larvae are stopped before they become biting adults.

What sizes do Mosquito Dunks come in?

Packs of 6, 20, and 100 dunks, with each dunk treating up to 100 square feet of surface water for 30 days or more. For a single birdbath or rain barrel, a Mosquito Dunks 6 Pack provides about six months of treatment at one dunk every 30 days, while the 20 and 100 dunk packs cover properties with more standing water.

How much product does a property need?

One dunk for every 100 square feet of standing water, replaced every 30 days or once it has fully dissolved. A birdbath, a rain barrel, and a small pond each need their own dunk, so the total grows with every place water collects.

Frequently Asked Questions

What sizes do Mosquito Bits come in?

8 oz and 30 oz. The Mosquito Bits Biological Mosquito Larvicide, 30oz is sprinkled or broadcast over standing water for a quick kill of existing larvae within 24 hours and reapplied every 7 to 14 days.

How long does a 100 pack of dunks last?

About a full year for eight water features, at one dunk per feature every 30 days.

Which product is listed for rain barrels?

Mosquito Dunks. Rain barrels are listed alongside gutters, tree holes, and animal troughs as places the dunks are used.

Are these products safe where pets drink?

Yes. Both are described as harmless to pets, birds, and fish.