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How Long Does Boric Acid Take To Kill A Roach

How Long Does Boric Acid Take To Kill A Roach

How long does boric acid take to kill a roach

Boric acid is probably something you have had a need to handle a cockroach issue. Because of caution, some people tend to not use acids around pets and loved ones. When used properly, it is one of the more effective and safest cockroach removal techniques available. Also, boric acid is not as deadly as its moniker would imply.

What is boric acid

Boric acid is not an acid, despite its name. Instead, it’s a substance that’s created by mixing boron with water. A substance called boron can be organically found in the environment and in food. You’ve ingested boron if you’ve ever eaten almonds or raisins. While people and pets are largely unaffected by this mixture, cockroaches are severely poisoned by it. 

Borax, which is gathered from mineral sources, is used to make the compound that is present in boric acid. Boric acid is widely accessible and can be purchased at your neighborhood hardware or grocery store. The mixture is packaged in a container and prepared for use right away. It doesn’t smell bad, and there are no harsh toxins in it.

The main disadvantage of using boric acid incorrectly is that it can leave a mess and lose its efficacy. It is best to sprinkle the powder in a location where cockroaches will probably travel through it.

What boric acid does to cockroaches

Cockroaches get covered in boric acid powder as they move through it, and it sticks to their limbs, legs, and other body parts. The substance is consumed by the cockroach as it preens (cleans itself). The cockroach’s body will automatically absorb the powder even if it doesn’t clean itself. Once inside the cockroach, the acid enters both the digestive and nervous systems and kills the creature soon after consumption.

Cockroaches consume other dead cockroaches, which is why boric acid is thought to be so effective. The majority of us are aware that cockroaches are not particular about what they ingest, even going so far as to consume other cockroaches when they are dead. This enables the acid to be ingested by numerous cockroaches, each of which will ultimately die and be consumed, and so on.

How long does boric acid take to kill cockroaches

Cockroaches are slowly killed by boric acid. Most of the time, it can take a cockroach up to 72 hours to expire after ingesting boric acid. This is advantageous to you. A cockroach will bring the powder back to its nest once it comes into touch with it. 

The compounds in the powder poison other cockroaches’ digestive systems and slow their metabolisms when they consume it. One poisoned insect can cause the death of several others.

How to use boric acid

  • Several tiny balls the size of chickpeas will be made from a mixture of an ample amount of icing sugar, a spoonful of boric acid, and a little milk. These balls will be strategically placed where cockroaches are likely to be found.
  • Create a paste by mixing 2 teaspoons of boric acid, 4 tablespoons of wheat flour, 12 an onion, minced into very small cubes, and a little water. Create tiny dough spheres, then scatter them in cockroach-friendly locations.
  • Place a slice of bread next to the active cockroach colony after soaking it in a solution made of 2 tablespoons of boric acid and 100 milliliters (half a glass) of water. The cockroach infestation will no longer be present in less than twenty-four hours.
  • Just mix 3 teaspoons of boric acid and 1 tablespoon of sugar together. Sprinkle in the specified locations, then wait

When the roaches emerge at night, apply the boric acid then wait until daylight for best results. If there are a lot of bugs in your home, a heavy application may be required, and you might want to consider leaving the house for two to three days.

  • The following morning, clean all the areas where the powder was used with a wet cloth and vacuum up any leftover boric acid. The bugs need to be removed.


Your mental health can suffer greatly from cockroaches, which are also notoriously difficult to fully eradicate. A detailed plan is necessary for effective roach control because additional treatment techniques are frequently needed. Call a pest control specialist before choosing to kill roaches by yourself.

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