Mothballs are occasionally thrown in gardens and lawns to keep away pets and other animals. However, mothballs are ineffective in repelling wildlife in outdoor areas such as rats, mice, squirrels, bats, snakes, or other wildlife.
“Unfortunately, mothballs are used in these locations to control pests other than clothes moths, including squirrels, skunks, deer, mice, rats, dogs, cats, raccoons, moles, snakes, pigeons and a variety of other animals,” Stock said. “Any such use is illegal and can be harmful to human health.
Mothballs are a registered pesticide. You can get fined for using a pesticide improperly. Mothballs according to the label are not to be used outdoors. And it can leech into the soil and waterways.
One mothball in open air takes 3-6 months to dissipate entirely. If you place the mothball underneath clothing or otherwise not in open air, it will take up to 12 months to completely dissipate. The mothball smell stays in your home for months or years after dissipating.
Mothballs are meant to kill moths, eggs and larvae, but are also used to keep rats, mice and squirrels away. Those containing paradichlorobenzene are safer than mothballs containing naphthalene.
The fumes from mothballs kill clothes moths, their eggs and larvae that eat natural fibers in indoor storage areas, such as closets, attics and basements. Mothballs are not intended to be used outdoors. The active ingredients can contaminate water and soil, harm wildlife, and contribute to air pollution.
Essential oils that may be helpful in repelling rats and mice include peppermint oil, lemon oil, citronella oil, and eucalyptus oil. You can make an essential oil spray by mixing 2 teaspoons of oil with 1 cup of water or rubbing alcohol in a spray bottle. Then spray it anywhere you see traces of rodents.
Mothballs are occasionally thrown in gardens and lawns to keep away pets and other animals. However, mothballs are ineffective in repelling wildlife in outdoor areas such as rats, mice, squirrels, bats, snakes, or other wildlife.
Mothballs should not be used to repel squirrels – nor should they be used to control anything other than clothes moths.
Be careful though if you are using mothballs with cats in the house. Many mothballs and flakes contain naphthalene which is dangerous to cats. A little sniff or lick might cause mild self-limiting signs such as nausea, vomiting and respiratory irritation. However, ingestion may lead to severe poisoning.
Natural alternatives such as cedarwood, lavender sachets, or essential oils offer a pleasant fragrance while effectively repelling moths. These alternatives are safe, non-toxic, and provide safeguarding without compromising indoor air quality.
Moth balls are made of naphthalene or paradichlorobenzene, which are both volatile compounds that slowly vaporize over time to repel moths and other insects. When moth balls get wet from the rain, their effectiveness can be greatly reduced because the water can dissolve the compounds and dilute their concentration.
Mothballs used outdoors can also contaminate soil, plants and water.
Peppermint oil — Essential plant oils like peppermint, rosemary, citronella, sage and lavender have strong botanical scents that rats dislike. One customer successfully repelled a rat by stuffing a peppermint oil soaked tissue into the rat hole chewed into the wall. The rat appeared to never come back.
The chemicals in mothballs have a strong odor that is unpleasant to insects, and this odor is what repels them. It's important to keep in mind, though, that mothballs are not made to keep raccoons away.
Mothballs are commonly thought to repel snakes, but they are not intended to be used this way and have little effect on snakes.
And we have some shocking news for you: a single mothball takes about 3-6 months to dissipate completely. If you put the mothball under fabric or someplace where there is no air circulation, it takes about 12 months to dissipate!
Scents like white pepper, black pepper, and garlic are naturally unpleasant to a squirrel. The same goes for sweet smells such as peppermint. Try spraying your plants and flowers with water and then sprinkling on pepper or peppermint oil to deter squirrels.
Irish Spring soap is one of many homemade solutions people use to repel squirrels. While it may work for some, other homemade solutions, like cayenne pepper or vinegar sprays, can also be effective. However, like Irish Spring, these methods often provide only temporary relief.
Another misunderstanding is the use of mothballs in outdoor areas to repel rodents, squirrels, bats, snakes or other wildlife. Mothballs are ineffective for this use and can contaminate soil and water. Using mothballs as animal repellants is not appropriate and can be illegal.
Can mothballs be used to repel pests indoors/outdoors? Mothballs are somewhat effective at repelling rats, mice, squirrels, bats, snakes, or other wildlife in outdoor areas. However, mothballs may contaminate soil and water and their use as animal repellants is not appropriate and can be illegal.
FAQs Around Mothballs
They begin their work as soon as you deploy them and often last for 3-6 months.
Some of the best oils to repel rats include peppermint, eucalyptus, citronella, and lavender. Simply soak cotton balls in any one of them and place a few where rats are likely to enter, like corners of the kitchen, basement, or garage.
Dryer sheets do not repel mice. The belief that dryer sheets can repel mice has gained popularity over time, primarily due to the assumption that scent of dryer sheets might deter rodents. However, this is a misconception, and using dryer sheets as a mouse repellent is not a reliable or proven method.
Outdoors, rats face a variety of predators. In these environments, large birds of prey — including hawks, falcons and owls — feed regularly on rodents. Owls are particularly formidable predators, as their nocturnal behavior ensures that they are most active when rats go out in search of food.