Diatomaceous Earth Food Grade For Fleas. When it comes in contact with an insect, the silica removes the waxy outer coating from the insect’s exoskeleton. Diatomaceous earth is great for flea control because it is pesticide free and easy to use.
Only use the “food grade” diatomaceous earth for flea control and stay away from the “pool grade” one. To start with, only use food grade de for flea control. Killing pests in the open air is where diatomaceous earth has some success.
If you’re planning to use diatomaceous earth for cats, choose the food grade type.
Fossilized diatoms, whose cell walls are made of silica, are used to make a fine powder called diatomaceous earth (de). The most common grades of de: People also want to know: You can apply it in wet or dry form—applying it in wet form allows it to cling to a surface easier, especially in the wind.