As someone who’s spent over a decade guiding trips and writing about the outdoors, I get asked about bug control constantly. Specifically, people want to know: do Thermacells work on flies, and what’s the best way to keep those buzzing pests away from their campsites, backyard barbecues, and pool areas? The short answer is…it’s complicated. Thermacells are effective against mosquitoes, but their efficacy against other biting insects, like flies and gnats, is more nuanced. This article will break down everything you need to know about Thermacells, alternative repellents like Coleman SkinSmart insect repellent, and strategies for creating a bug-free zone, even considering options like bubble machines (yes, really!).
Thermacell devices create a 15-foot zone of protection by heating a repellent-soaked pad, releasing allethrin, a synthetic pyrethroid insecticide. This mimics naturally occurring pyrethrins found in chrysanthemum flowers. The National Park Service highlights the importance of mosquito control due to the diseases they carry, and Thermacell offers a non-spray alternative. However, the key word here is “mosquitoes.”
Thermacell is most effective against common mosquito species like Aedes, Culex, and Anopheles. These mosquitoes are attracted to carbon dioxide, body heat, and scent – all things Thermacell’s allethrin plume disrupts. But what about other biting insects?
Flies and gnats often have different attraction mechanisms than mosquitoes. They’re more attracted to visual cues, odors from decaying organic matter, and sometimes, simply landing on you. While some users report a reduction in fly activity near a Thermacell, it’s generally less dramatic than the mosquito control. Gnats, in particular, are often small enough to drift through the Thermacell’s zone of protection. I’ve personally found Thermacells to be moderately helpful with black flies, but less so with house flies or fruit flies.
Relying solely on one method is rarely the best approach. Here’s a breakdown of other effective options, covering everything from personal repellents to backyard solutions.
These are your workhorses. The EPA provides comprehensive information on insect repellent ingredients.
Coleman Skinsmart insect repellent, for example, utilizes a picaridin formula and is a popular choice for its effectiveness and pleasant feel. I often recommend it to clients who prefer a DEET-free option.
For your pool area or patio, a multi-pronged approach is best. Here’s what I recommend:
You’ve probably seen the videos: people claiming bubble machines repel mosquitoes. The theory is that the soapy water disrupts the mosquito’s wings. While there’s some anecdotal evidence, the scientific consensus is…not really. Snopes has debunked this claim. It might offer a very temporary and localized effect, but it’s not a reliable solution. It’s more likely the distraction of the bubbles keeps people from noticing the mosquitoes.
Even the best gear can have hiccups. Here are some common Thermacell problems and how to fix them.
This is a frequent complaint. Here’s what to check:
I’ve seen some folks online suggesting spraying bug repellent on headlights to attract and kill insects. I strongly advise against this. It’s messy, potentially damaging to your headlights, and likely ineffective. The repellent will quickly be blown away by the wind, and it won’t significantly reduce the overall insect population.
As outdoor enthusiasts, we have a responsibility to minimize our impact on the environment. Here are some tips for safe backyard mosquito control:
Leave No Trace principles apply even in your backyard – minimize your impact and protect the environment.
So, do Thermacells work on flies? They’re excellent for mosquitoes, but less reliable for flies and gnats. The best approach is a layered defense: personal repellent (DEET, Picaridin, or OLE), backyard control measures (eliminating standing water, fans, misting systems), and a healthy dose of realism. Don’t rely on any single solution. By combining these strategies, you can significantly reduce your exposure to biting insects and enjoy your time outdoors to the fullest. And remember, a little preparation goes a long way!