The label is the law. Rates and restrictions below are taken from the product labels listed under Sources. Your product's own label governs; read it before you mix or apply. Mixing calculator · Disclaimer
- Active ingredient
- Transfluthrin
- Chemical class
- Pyrethroid; IRAC lists transfluthrin in Group 3A sodium channel modulators.[2]
- Mode of action
- IRAC Group 3A: Sodium channel modulators: pyrethrins and pyrethroids[2]
- Signal word
- Dynatrap Mosquito Repellent (device with 16-hour or 48-hour refill cartridges): Caution[1]
Outdoors and semi-enclosed spaces only
The label allows use outdoors and in semi-enclosed areas such as porches, gazebos, garages and canopied areas. It rules out indoor use and enclosed spaces, naming tents as an example.[1]
Keep the device out of rain and standing water, and store it indoors when you're not using it. Let it cool for 5 minutes and recap the cartridge before you bring it in.[1]
Where it is used
Charge the device fully before first use. Uncap a refill, push it up into the bottom until it clicks, and press the power button.[1]
Give it up to 15 minutes to build the protection zone. On a windy evening, put the device upwind of where you're sitting.[1]
If mosquitoes still bother you after 15 minutes, check that the light is on, the cartridge still has liquid, the wick is intact, and you are within 14 feet of the device.[1]
Swap the cartridge when the liquid level runs low. Refills come in 16-hour and 48-hour sizes; put the cap back on whenever a refill is out of the device.[1]
Products and registrations
| Product | Registrant | EPA Reg. No. | Active % | Formulation | Signal word |
|---|---|---|---|---|---|
| Dynatrap Mosquito Repellent (device with 16-hour or 48-hour refill cartridges)[1] | Woodstream Corporation | 36488-72 | 8.83% | liquid refill cartridge in a heated, fan-driven device | Caution |
Label rates
| Product | Use | Pests | Rate |
|---|---|---|---|
| Dynatrap Mosquito Repellent (device with 16-hour or 48-hour refill cartridges) | Yards, patios, decks, porches, gazebos, garages and canopied areas | Mosquitoes | 1 device per 616 sq ft zone (14 ft radius)[1] Set the device in the middle of the space you want covered, on a flat surface about 30 inches off the ground. To protect a bigger area, the label suggests spacing extra devices 28 feet apart. |
Safety and environmental hazards
People
Signal word CAUTION: harmful if inhaled and may cause eye irritation. Avoid contact with skin, eyes or clothing, and wash with soap and water after handling. If it's swallowed, call a poison control center or doctor at once and don't induce vomiting unless told to; the refill contains petroleum distillate.[1]
Pets
Store the device and refills where children and pets can't reach them. The label gives no pet-specific directions beyond that.[1]
Bees and pollinators
The environmental hazards statement says the product is toxic to bees.[1]
Fish and water
Toxic to freshwater fish and invertebrates. Don't apply it to water, and never pour unused product down an indoor or outdoor drain.[1]
Common questions
- How big an area does one Dynatrap Mosquito Repellent cover?
- A zone about 28 feet across, or 616 square feet, when the device sits in the middle of the area.[1]
- Can I use it inside a tent?
- No. The label excludes enclosed spaces such as tents and says not to use it indoors.[1]
- Is transfluthrin safe for bees and fish?
- The label says it is toxic to bees and to freshwater fish and invertebrates, and tells you not to apply it to water.[1]
Sources
- U.S. EPA Pesticide Product Label System, “Dynatrap Mosquito Repellent label, EPA Reg. No. 36488-72 (EPA-stamped, Mar. 27, 2026).” www3.epa.gov/pesticides/chem_search/ppls/036488-00072-20260327.pdf (accessed 2026-10-06)
- Insecticide Resistance Action Committee, “IRAC Mode of Action Classification Scheme, Version 11.5 (Feb. 2026).” irac-online.org/documents/moa-classification/ (accessed 2026-10-06)