Does Plaster of Paris Really Kill Rats?

Plaster of Paris comes in a white powder form that is fine and can be mixed with almost anything to kill rats. This is because it may look like the floor or even fine sugar and rats will not be able to tell the difference as long as you mix it with something that they like.

Plaster of Paris kills rats because it contains calcium sulfate that turns into an indigestible solid in the stomach when mixed with fluids. This causes them to bloat and die. To kill rats, mix 1 tablespoon of peanut butter powder with 1 tablespoon of plaster of Paris and let them eat it.

Rats cannot resist peanut batter and this is what will attract them while the plaster of Paris will turn into a hard solid that they cannot digest after eating. This can also solidify in the digestive tract and will cause a deadly blockage.

Does Plaster of Paris Really Kill Rats

How to make rat poison with plaster of Paris

Advice: Plaster of Paris will turn into a solid when mixed with any fluid whatsoever and the rats will not be able to eat it. So before mixing it with anything, ensure it is dry and there are no fluids or water involved whatsoever.

There are several options that you have as long as it can blend well with the plaster of Paris powder. The idea here is to use any food that attracts rats the most as bait to lure them. Here are 5 simple ways to make plaster of Paris rat poison at home:

1. Minced meat  + plaster of Paris

Rats love meat and the best bait to use here is mincemeat that has been steamed and dried. This will blend well with the plaster of Paris powder. The best option is to use dried minced meat as bait.

  1. Pour 1/4 cup of plaster of Paris powder in a clean dry container
  2. Add 1/2 cup of dried minced meat
  3. Place it near the rat’s hideout and let them eat it

2. Oatmeal + plaster of Paris

You can mix any type of oatmeal including coarse, pinhead, or Irish oatmeal. All this will work as a bait to kill rats when mixed with plaster of Paris because rats love them. However, ensure they are dried and in powdered foam.

  1. Mix 3/4  glass of oat meal with 1glass of plaster of Paris powder
  2. Ensure this is properly blended together and place the mixture where you know the rats will find it

3. Flour +  sugar + plaster of Paris

Rats can eat plain flour but mixing it with sugar will even make it more attractive to them. This will make them eat it in large quantities if mixed with plaster of paris. Here is how to do it:

  1. Pour 1/4 glass of flour in a dry container
  2. Add 1/2 glass of plaster of Paris
  3. Then mix this with 1/4 glass of sugar
  4. Spread this where you always see the rats

4. Powdered chocolate +  plaster of Paris

One of the best ways to get rid of rats using plaster of Paris poison is to mix it with chocolate powder. Rats can smell Chocolate from a distance and they will not resist it at all.

  1. Put 5 tablespoons of powdered chocolate in a clean bowl
  2. Add 8 tablespoons of plaster of Paris to it and mix it well
  3. Let the rats eat the mixture and wait for the results

5. Powdered ground nuts + plaster of Paris

Powdered ground nuts have a strong smell that rats love. Rats love ground nuts in general because it has a sweet natural taste to them and they will eat it even if they are full. Here is how to make rat poison at home with plaster of Paris and powdered nuts:

  1. Simply mix 1/2 cup of plaster of Paris powder with 1/2 cup of powdered ground nuts and ensure they blend well.
  2. Place it in a strategic position where the rats will enjoy it.

 Use powdered nuts because it is fine and easy to mix with plaster of Paris powder to make a fine blend. Using ground nuts in their whole original form will not be effective because they will not mix well with the powder. Alternatively, you can use powdered sweet potatoes for rats since it will also have the same deadly effects.

How long does plaster of Paris take to kill rats?

It takes 2-4hours for homemade plaster of Paris to kill rats. This is because the longest time rats can take to digest food is 2 hours. So if rats eat the bait in large quantities, it will start affecting them after hours.

After the bait starts to solidify in the rat’s stomach, you will see them stretching with abdominal pains. Since rats cannot vomit, they will become frustrated with an urge to take more water.

Taking water will even make it worse for them because the plaster of Paris will become more sticky. Since they cannot pass it out as a stool or vomit it, they will die in large numbers as long as they took the bait.

This is why using powdered chocolate and peanut butter mixed with plaster of Paris is the best rat poison because they become thirsty very fast after eating the mixture in large quantities.

Is it safe to use plaster of Paris to kill rats at home?

Yes, it is safe to use plaster of Paris rat poison at home as long as you do not let your kids or pets reach it. It is important to watch where you place the bait because it may be tasty to your pets as well.

It is therefore advisable to use this bait at night when everyone is asleep and remove it very early in the morning before they wake up. This is just an additional precaution to ensure that there are no accidents whatsoever.

It is also important to place the bait in very strategic positions where you know the rats will not miss it. Once you have identified what rats eat in your house, you can trace the rats’ activities by finding their stools or the dirt that they leave behind after eating in those areas.

When using plaster of Paris poison to kill rats outdoors, ensure you place the bait in hidden positions away from any poultry or pets because it can affect them just like it can affect the rats.

In most cases, rats will leave if there is no food at home. They cannot live without eating and this is why it is important to use baits i.e ammonia rat bait because rats will not resist food. For best results, starve the rats before placing the baits so that they can eat them in large quantities.

References:

  1. Oxford Reference: Plaster of Paris composition: Oxford University Press
  2. SFGATE: Can you reuse unused plaster of Paris