Rats and mice are deterred by the chemicals found in black pepper (piperine) as that chemical is actually very toxic to them.Īnother compound that will make rodents sick and they tend to avoid is castor oil. As a reference point, here is a video showing rats comfortably eating the hottest peppers in the world. Products based upon the chemicals found in spicy red peppers (Capsaicin) are highly effective at keeping squirrels from chewing on objects but will not deter rats or mice. These deterrents are a little tricky since not all rodents have the same taste receptors. Natural Repellents That Taste Bad to Rodents (Prevents Rats Chewing) The idea behind these products is that if a rodent smells the presence of something that wants to eat it then it will not want to be in the area. I have been unable to find a single scientific study that showed rodents were repelled by organosulfur compounds.Īnother class of repellent that is based upon the rodent’s sense of smell is predator urine. While it probably doesn’t hurt to include these compounds the reality is that they are unpleasant to humans but not necessarily to rodents. You will see these ingredients listed as “putrid eggs” and “extracts of garlic and cloves”. Many repellents will also include some organosulfur compounds because they smell so unpleasant to humans. Peppermint oil is available as a concentrated extract or as a pre-formulated spray. According to the New York State Integrated Pest Management Program and the Cornell Cooperative Extension, peppermint oil is a viable ingredient eligible for Minimum Risk Pesticide Use and has been shown to be effective in repelling rats.
Peppermint Oil is probably the most popular natural deterrent owing to its ease of use and pleasant smell. Balsam pine oil has been studied and registered with the EPA as a non-hazardous biochemical pesticide According to the EPA documentation, “Balsam fir oil repels rodents by emitting an odor that is offensive to rodents but not offensive to humans.” Natural Repellents That Create Unpleasant Smells for Rodents (Keeps Rats Away)įresh Cab is a commercial product with the active ingredient being balsam fir oil. Other options, such as pepper extracts and castor oil, are highly unpalatable and prevent rats and mice from chewing and eating whatever they are applied to.īy combining products that keep rodents away with a product that prevents rodents from chewing you greatly increase your chances of success. For example, some options, such as balsam fir oil and mint, create an odor that rats find unpleasant this makes rodents want to stay away. The natural repellents work by different mechanisms from each other and sometimes it makes sense to combine two or more options.
Natural Repellents for Rats, Mice, and Rodents Electronic repellents sometimes work in the short term but rodents quickly learn to ignore them. Overwhelmingly, the best repellents for rats, mice, and other rodents are the natural repellents based upon the chemicals found in balsam fir oil, mint, black pepper, red pepper, and other natural ingredients. There are two classes of rodent repellents, Natural and Electronic. It begs the question, “What are the best repellents for rats, mice, and other rodents?” I did a little research and want to share what I learned. The problem is that there are a lot of different repellents for sale and some are not as good as others. If you are dealing with rats, mice, squirrels, or other rodents tearing up your garden, pooping all over your attic, or eating the wires in your cars then trying to find a repellent for these creatures makes a lot of sense.
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