As an insecticide, it’s mostly used to kill cockroaches, ants, silverfish, termites and fleas. As an herbicide, it’s best on molds, fungi and some kinds of weeds. Like boric acid, borax is ...

Vacuum the DE thoroughly, ensuring all fleas and residue are removed from your carpet. Boric acid has many uses, but it's an especially effective method for eliminating fleas in carpet.