Diatomaceous earth is an effective pest control used to eliminate insects like: fungus gnat larva, mites, lice, ants, millipedes, earwigs, cockroaches, silverfish, bed bugs, crickets, centipedes, pill bugs, sow bugs, most beetles.
Diatomaceous earth will not harm compost worms or common house plants. Compost worms are structurally different from insects and can actually digest particles of diatomaceous earth.
Diatomaceous earth is made from the fossilized remains of microscopic, aquatic organisms called diatoms which have skeletons made of naturally occurring silica. Today, diatomaceous earth is sourced by mining ancient diatom silica deposits from dried river and ocean beds. The diatoms are pulverized into a fine powder. The crushed silica skeletons are sharp and abrasive to the chitinous waxy exoskeletons of insects and larva. The exoskeletal erosion causes pests to dry out and expire, halting reproduction and ending infestations.