Diatomaceous earth, or diatomite, is a naturally occurring sedimentary rock that consists of fossilized diatoms, which are microscopic algae with intricate silicate shells. Diatomaceous earth used for pest control purposes is found in the form of finely ground powder derived from these fossilized remains.
When it comes to killing ants and other pests (like bed bugs), diatomaceous earth (DE) acts as a mechanical insecticide. When insects come into contact with DE, the microscopic particles adhere to their exoskeletons. As the insects move around, these sharp-edged particles cause abrasions and cuts, leading to the gradual loss of the insects’ waxy protective layer which serves to retain moisture. As a result, the insects become vulnerable to desiccation, or dehydration.
This dual mechanism of action—physical abrasion and desiccation—makes diatomaceous earth a potent and environmentally friendly solution for pest control.
