How To Use Onion To Kill Rats? And Do Rats Eat Onions?

Hey there! Some links on this page are affiliate links which means that, if you choose to make a purchase, I may earn a small commission at no extra cost to you. I greatly appreciate your support!

There are so many methods to kill rats, but where you aware onions are also amongst them? Well, in the content of this article, we will discuss all the relevant information regarding how to use onion to kill rats. Take a look.

How to kill all rats?

There are a variety of ways to kill rats, but the most common and effective way is by using traps. There are various types of traps you can use, depending on your needs, but all of them work in basically the same way: the rat steps on the trap and is then killed.

White Pet Mice

If you’re dealing with a rat infestation, then you’ll need more than just one type of trap. You’ll also need to call in a professional to help get rid of the rats for good. Or else other home remedies such as the usage of onion are also a good idea.

Do Onions Kill Rats?

Onions contain large amounts of sulfur, leading to gastrointestinal problems and death in rats. If you are looking to kill rats, onions may be a good option as they are readily available and relatively cheap.

However, it is important to note that other methods may be more effective or less dangerous.

This is because rats have a strong sense of smell, and they will avoid anything that smells bad.

On the other hand, if you have a pet rat, the compounds that make onions taste and smell bad to humans are still present in rats, so feeding them cooked onion is generally safe. However, it is always advised to feed any food in moderation, so do not overfeed your rats on onions.

Before using onions to kill rats, do your research and understand the potential danger involved.

How to use onion to kill rats?

Onions contain a compound called allyl propyl disulfide, which is toxic to rats and mice. When ingested, it can cause liver damage and death. For this reason, onions can be used as rat poison.

Rats are more resistant to the toxicity of onions than other domestic animals, but this doesn’t mean that they can’t be harmed by them. In fact, rats have been known to die after ingesting as few as five onions.

Onions, when ingested by rats, can cause a variety of health problems. In addition to causing anemia, onions can also lead to gastrointestinal disorders, including excessive gas production due to the acidity present in the stomach.

Do Onions Kill Mice?

ways season weeds trap pest

Onions tend to have a high sulfur content which makes them poisonous to rodents. If you place raw onions in an area where there are mice, the smell will repel them, and the onions will eventually kill them.

When it comes to using onions to kill rats, there are a few things you need to know. For starters, cooked onions are safe to eat and will not harm humans or pets.

Additionally, rats generally do not resist the smell of onions and will eat them if they come across them. Finally, placing chopped or sliced onions in areas where rats frequent can help get rid of them quickly and efficiently.

How Much Time Does It Take for Onions to Kill Rats?

Onions are a natural way to kill rats. When ingested, raw onions cause rats to die within 12 hours. You may need to know a few things about how onions kill rats, including the fact that there is no evidence that cooked onions are effective in rat poisoning.

You should also be aware of the dangers of using rat poison and how to dispose of dead rats properly.

Furthermore, different types of rats will react differently to onions. Secondly, the amount of raw onion ingested will also affect how long it takes for the rat to die.

In most of case, if a rat ingests a large amount of raw onion, it will die within hours. However, in rare cases, some rats can live a day or two until they die, depending on how much raw onion they ingested.

Do Rats Like Onions?

Wood Mouse (Apodemus sylvaticus)

Rats hate onions. This is because onions contain a compound that is irritating to their eyes and respiratory system. Rats will avoid anything that smells like onions, so using them as a rat repellent is a great way to keep them away from your property.

Onions are a popular home remedy for rat control. They are inexpensive and can be found at most grocery stores.

Rats do not like the smell of onions, so if you place them around your home, the rats will stay away. You can also put raw onions where you store food to keep the rats from eating it.

Rats have been known to have a keen sense of smell, so they can detect the smell of raw onions from a distance. However, rats will stop eating raw onions after taking a few bites because of their strong taste.

DIY Onion Rat Repellent

Onions have a pungent smell that deters rats so that they will stay away from your property. There are many ways to get rid of rats, one of which is using onions. Let us find out.

Onion stew

Raw onions are a popular ingredient in rat traps because they smell strong, and rats love the taste. You can either place the chopped onions directly in the trap or put them in a stew that will attract rats to the trap.

The stew can be made with various vegetables, but it is important to chop the onions finely to release their scent and flavor.

Onion Food Baits With Fried Meat

One way to bait rats with onion is to mix raw onions with hot fried meat. The rat will be attracted to the smell of the meat and will eat the onion as well.

It is effective because the onion’s heat cooks the outer shell of the onion, masking its smell. This makes it difficult for the rat to detect and avoid.

This bait can be placed near the entrance or holes, corners, or keep them disguised in cookies, etc, to attract rats and can be very effective in getting rid of them.

Are Cooked Onions Okay for Rats?

Cooked onions are safe for rats if eaten in moderation. Rats can eat cooked onions, but it is not recommended to give them too many since they are high in sugar.

Rats are not fans of onions in any form, whether they are cooked or raw. Onions contain toxins that can kill rats, but the toxins are reduced when the onions are cooked. This makes them less smelly and deadly to rats.

Lastly, rats are not deterred by the smell of cooking onions, and in fact, they will eat them more readily. However, this does not mean that cooked onions are harmful to rats; in fact, they are just as nutritious as raw onions.

However, if you are concerned about your pet rat eating onions, you should avoid feeding them cooked onions.

Can Rats Eat Caramelized Onions?

Yes, rats can eat caramelized onions. Caramelized onions are cooked at a high temperature, and this destroys any toxins that may be present in the onion. The onion will also taste sweet, and rats love sweets!

Can Rats Eat Green Onions?

How to use onion to kill rats?

Rats are not particularly attracted to green onions, but they will eat them if they are hungry enough. Green onions generally do not contain as much sulfur as white onions, making them less pungent and less toxic to rats.

However, it is still recommended that you use caution when using any type of onion to kill rats, as they may be resistant to the toxin.

Green onion toxicity in rats is caused by the presence of organosulfur compounds, which inhibit the rat’s ability to use oxygen.


Now you know the right way to use onions if you are looking to kill them. However, the more humane thing to do is to trap them and release them outside.

About the author

A biotechnologist by profession and a passionate pest researcher. I have been one of those people who used to run away from cockroaches and rats due to their pesky features, but then we all get that turn in life when we have to face something.