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Plaster of Paris, also known as gypsum, is primarily composed of the chemical Calcium Sulfate. If your rats consume enough of these treats they will die in about a day.

Scatter the baits in areas where you have seen rat droppings or other signs of rat infestation. To make sure that the ingredients mix well you will need to pulse them in a spice/coffee grinder for about 15-20 seconds to get a uniform particle size distribution.

The sugar and baking soda have different particle sizes and will naturally separate if they are mixed without any further preparation.

The gloves are to keep your hands clean and keep your scent off of the bait. Wear gloves and form the mix into small balls about the size of a grape.

Thoroughly mix the baking soda and peanut butter to achieve a uniform consistency.

So, if you can find a way to get your rats to eat more than a teaspoon of baking soda then you have a good chance of killing them! Here are a couple of homemade pet safe rat poison options to get you started: Rat & Mouse Poison Recipe #1 Using the LD50 information shows that a rat would need to eat (7.3 g/kg) x (.275 kg/rat) = 2 grams to reach the LD50 level.įor those of you that don’t think in terms of grams, a good reference point is that 1/2 of a teaspoon of baking soda weighs 3 grams Let’s do a little quick math to figure out if it is a viable rat poison for home use.Īn average adult rat weighs about 275 grams.

This means that baking soda rat poison is, roughly, 4,500 times LESS EFFECTIVE than Warfarin for killing rats.īut just because baking soda is less effective than Warfarin does not mean that it doesn’t work. The LD50 for this compound is 7.3 grams which is equal to 7,300 milligrams. Below is the toxicity data for sodium bicarbonate. Homemade rat poison baking soda turns into a bunch of gas that the rat can’t expel which somehow then kills that rat. So, the rat eats it which then comes into contact with acids in the rat’s stomach. It is actually sodium bicarbonate and will readily decompose to produce carbon dioxide gas under acidic conditions. The thought behind killing rats with baking soda is based on the idea that rats cannot burp. It is cheap, readily available, and safe for children and pets. To kill rats with baking soda is one of the most popular DIY homemade rat poison options you find on the Internet. Now, let’s see how the homemade options stack up! Killing Rats With Baking Soda

I just wanted you to have a reference point to know that, very roughly, “1.6 milligrams” is how much of a GREAT rat poison you need to kill a rat. So, if you had 100 rats that weighed a kilogram each and they all consumed 1.6 milligrams of Warfarin then about 50 of them would die.ĭon’t get too caught up in the math or the technical terms. The term “LD50” refers to the Lethal Dose for 50% of a rat population. Below is the toxicity data towards rats for Warfarin that is included in its Material Safety Data Sheet It turns out that the toxicity of most chemicals towards rats has been scientifically determined and is included in their Material Safety Data Sheets. Warfarin is HIGHLY effective at killing rats. Many commercial rat poisons are based on a drug called Warfarin which is a blood thinner that causes rats to die from internal bleeding. I did some research to discover which of the most popular DIY poisons (Baking Soda, Plaster of Paris, Salt, etc) were the most likely to actually kill a rat and came up with a few winners and a lot of losers.īefore we jump into all of the homemade rat killer options it is important that we have a baseline for comparison. Get rid of mice and rats with these potential rodent poisons that work! If you have a rat problem and are looking for ways to deal with the issue in a way that is safe and inexpensive then it makes sense to use some homemade mouse and rat poisons that you can make from everyday items in your house. Killing Rats with Coke, Pepsi, or Other Carbonated Beverages.