The only problem is that there is zero evidence that they work. It is a liquid repellent for mosquito. It’s simply citronella, but the skeeters hate it! That may have been true about the old school zappers but with new technology, these zappers are great for larger areas and they don’t contain harsh chemicals that can be unsafe for kids and pets. This unit utilizes a refillable insect repellent cartridge that releases into a 15 by 15-foot space by the power of a separate, butane cartridge. This is why metofluthrin works in conjunction with the lower temperature that the Thermacell Radius’s lithium-ion battery provides. As for effectiveness, the MR450 is right on a par with the Radius. The higher cost of the Off coils is due in part to the fact that each comes with a small tray to catch bits of ash as the coil burns down. In this list, we have found the best mosquito repellents for yard and patio, so that you can prevent those seasonal pests from biting in the first place! Black+Decker has been making every kind of appliance you can think of and they make a best selling bug zapper that looks cool and covers up to 625 square feet so it is the perfect item to use on your patio or back deck. It’s too easy to leave the unit heating once the repellent pad is expired, though, which throws that coordination off. I would get one for inside the house, as well as the front porch and back porch areas. The ash, the smoke, and the weaker durability of coils relative to our pick together make the Pic repellent less portable and versatile than a Thermacell option. But there are some key differences between coils and our other picks: Some people find the smoke’s strong odor unpleasant or irritating, the burning ember at the tip can be a safety issue, the coils can drop ash as they burn, and they’re not as portable or durable as our picks. They smell nice too! In addition, the Radius has a timer setting that automatically shuts the unit down after 120 minutes. Price was far less important than finding the most effective option, but we still looked for something we could simply set out, turn on, and expect to do its job while we ignored it. We also read as much as we could on mosquito repellents, traps, and other control products, focusing our attention on information from the AMCA as well as a number of studies, such as ones found in the Journal of Insect Science, Acta Tropica, and the Journal of Medical Entomology. It can be used for 12 hours at a time and is DEET free without the need for sprays, scents or smoke. A few additional methods of mosquito control are worth considering, including simply running a fan, and of course, using the most predictably effective option, a spray repellent in conjunction with permethrin-treated clothing. The downside, we found, was that it made a little whirring fan noise that sometimes chattered when we moved the unit. This device operates on batteries, and mimics a standing-water location in your yard. It uses a similar electronic heating element as the Radius 2.0, but with a much more stylized look and a simpler interface, including more intuitive charging and heating indicator lights. This pack has 120 total coils. Allethrin needs a butane heat source to vaporize, but metofluthrin can vaporize on its own. *At the time of publishing, the price was $50. With the Pic coils, you need to put your own small plate underneath to catch the ash—a minor inconvenience we thought was worth tolerating for the Pic’s lower price and longer-lasting effects. Fortunately, it’s not too expensive to refill the fuel and repellent for this unit and it’s one of the most economic options for effective mosquito defense in any setting. © 2020 Wirecutter, Inc., A New York Times Company, Thermacell Radius Zone Mosquito Repellent Gen 2.0, Thermacell Radius Zone Mosquito Repeller Gen 2.0, Thermacell MR450 Armored Portable Mosquito Repeller, Not as convenient, durable enough for camping, Thermacell MR450 Armored Portable Mosquito Repeller, Our pick: Thermacell Radius Zone Mosquito Repellent Gen 2.0, Runner-up: Thermacell MR450 Armored Portable Mosquito Repeller, Budget pick: Pic Mosquito Repelling Coils, The effectiveness and safety of pyrethroid repellents, Other effective ways to combat mosquitoes, Ineffective methods that aren’t worth your time, Centers for Disease Control and Prevention, eliminate a number of popular control methods, Thermacell Radius Zone Mosquito Repellent, Thermacell Patio Shield Mosquito Repeller, the effectiveness and safety of Thermacell repellents, 48-hour refill packs of butane and cartridges, several similar butane-based options from Thermacell, the effectiveness and safety of pyrethroid repellents, some owners who have used multiple coil types, Journal of the American Mosquito Control Association, Proceedings of the Fifth International Conference on Urban Pests, 1951 article in the Journal of the American Chemical Society.

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