How To Kill Household Pests with Boric Acid

Boric Acid has been around for many years.  Our mothers washed our clothes in it.  Some may remember the laundry detergent Boraxo or 20 Mule Team Borax.  It has also been used for many years to kill household pests such as: cockroaches, ants (all kinds), silverfish, fleas and spiders.  Boric acid is also very cost effective.  A large bottle can be purchased at most hardware or dollar stores for about $2.00.

Boric acid is orderless and safe around children and pets when used properly.   Of course you don't want your children rolling around in it and you don't want to put it directly by your pets food, but used correctly, boric acid is very very safe.

To kill those nasty cockroaches, ants and spiders, you can do 2 things:

  1. Sprinkle boric acid behind your stove, refrigerator, sinks and washer and dryer.  Also sprinkle some in cracks and crevices in the house and outside.  Just make sure that the cracks are not accessible to pets and children.  The insects will walk across the boric acid and carry it back to their nests where their young will consume it and die.
  2. Mix some boric acid and sugar with water and soak some cotton balls with the boric acid solution.  Place the cotton balls on a small lid or dish and place it in cupboards or corners.  The insects will be drawn to the sugar and eat it and die.  Or you can add some flour and make balls of boric acid/sugar mixture and the insects will eat it, then return to their nest and feed their young and die.

To kill fleas in your home, sprinkle boric acid on your carpet and leave on for 24 hours.  Please be sure to keep children and pets away from the area for that time.  After 24 hours, simply vacuum up.  Make sure you empty your vacuum outside.  To kill fleas outside, sprinkle boric acid on your lawn and garden.  It is best to do this when you are not expecting any rain for about 24 hours.  You can also mix up some boric acid, a little sugar and water and spray your plants with it.  This will kill bugs on your plants.

Please be aware that although boric acid is a great pest control, it can take up to 2 weeks before you see the results you want.  This is a natural killing process, so please be patient.  Sometimes all it takes is one application of boric acid to permanently kill pests like cockroaches. However, I have found through my own use that I place fresh boric acid out about every 6 months and have completely rid my home of cockroaches, spiders and fleas.


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