My father applied boric acid to carpets, pet bedding and fabric furniture, let it set for several hours, and then vacuumed. The fleas were never again a problem. The boric acid wasn't applied to ...

A: Boric acid is a powder that removes the waxy coating on the exterior of the insect's body when they crawl over it. The waxy coating is used to retain water and without it the insect quickly ...

What Else Is Borax Powder Used For? In addition to being a pesticide, borax powder is a great herbicide. The boric acid disrupts photosynthesis and suppresses plant growth and algae growth.