How Effective Is Diatomaceous Earth for Fleas?

By Elizabeth Tumbarello, eHow Contributor

Diatomaceous earth (DE) is an all-natural flea control remedy that works to dehydrate adult fleas. When applied to the animal's environment, as well as the animal itself, it is as effective as chemical alternatives. While chemical flea treatments are made up of poisons, diatomaceous earth works naturally to rid a pet of fleas.

What It Is

• Diatomaceous earth is a fine powder made from diatomite, the crushed, fossilized remains of a marine algae called a diatom. Food grade diatomaceous earth is used among farmers as a wormer, to rid animal feed of insects and as a nutritional supplement.

How It Works

• DE, when used in flea prevention, cuts holes in the flea's body as it moves across it, and as this happens, the fleas leak water which the diatomaceous earth absorbs. Because of this, the fleas dehydrate and die.
• Types of Diatomaceous Earth

• One formulation, containing crystalline silicate, is commonly sold for use in pools. This is not safe for use around animals or humans. DE for flea control should be USDA food-grade certified.

Considerations

• When an animal or area that has been treated with diatomaceous earth gets wet, the efficiency of DE drops. Therefore, animals or bedding treated with DE should be kept as dry as possible.

Diatomaceous Earth vs. Chemical Flea Control

• In tests performed by the USDA, as well as consumer trials, diatomaceous earth has shown to be just as effective as chemical insect control.

Safety Considerations

• When applying DE to large areas, such as a pet's sleeping area, a dust mask and goggles are recommended. If diatomaceous earth is applied directly to the animal, care should be taken to avoid any mucous membranes (eyes, ears, nose) that may become irritated.