Homemade mosquito repellents: A Wisconsin expert weighs in
As summer approaches, so do the mosquitoes. While bug sprays are a common choice to keep these pests at bay, some people opt for homemade remedies, often involving citrus, essential oils, and various household ingredients. But are these DIY solutions as effective as they claim to be? PJ Liesch, director of the UW-Madison Insect Diagnostic Lab, offers his insights.
The Science Behind Homemade Repellents
Liesch emphasizes that homemade mosquito repellents are often more of a myth than a science. Unlike commercial products, these remedies haven't undergone rigorous lab testing. Instead, their efficacy is often based on word-of-mouth and social media claims. He states, "There typically is little to no science backing those sorts of things up."
The effectiveness of these remedies is short-lived, according to Liesch. Essential oils, a common ingredient, are highly concentrated plant extracts with potent chemicals and scents. While there's some research on their insecticidal properties, the results show that their repellency is usually fleeting. He explains, "If there is repellency or insecticidal properties, i.e., actually killing insects, the effectiveness of that tends to be very short-lived."
Potential Health Risks
Liesch also highlights the potential health risks associated with essential oils. These concentrated extracts can pose dangers, which is why he recommends using EPA-registered formulas. He advises, "Because essential oils are so concentrated, they can pose potential health risks, which is why I recommend using EPA-registered formulas."
The Limitations of Homemade Solutions
The perceived effectiveness of homemade repellents can be misleading, Liesch warns. He suggests that factors like moisture, humidity, and standing water play a significant role in mosquito populations. He advises, "If you take a look at the bigger picture, perhaps we were in the midst of a drier or droughty period. There are other bigger factors at play that are really the drivers behind the mosquito situation."
Alternative Strategies
Instead of relying on homemade remedies, Liesch suggests several effective alternatives. He recommends long-sleeve and baggy clothing, as lighter-colored, less-reflective material is generally more attractive to mosquitoes. His preferred solution is a simple box fan, which creates a physical barrier that mosquitoes struggle to fly through. He explains, "If you're going outside for a half-hour in the evening, it's very easy to turn a fan on. It's essentially instantaneous. And then when you're done, you just turn it off or unplug it and then you can head back inside."
In conclusion, while homemade mosquito repellents may offer some temporary relief, they are not a reliable long-term solution. Liesch's advice is to focus on the core issue: preventing mosquitoes from reaching you. By combining practical strategies like clothing choices and wind conditions, you can effectively reduce the risk of mosquito bites and enjoy a more comfortable summer.
