Diatomaceous earth

Diatomaceous earth, or diatomite, is a white powder consisting of the fossilized remains of hard-shelled, sharp-edged diatom algae. Its tiny but very sharp edges fatally wound soft-bodied insects. Additionally, it absorbs oils from insects' waxy outer exoskeleton, causing dehydration. Typically applied as a dust, it may also be mixed with water and sprayed on, though this reduces its absorptive effect. It is most effective in a dry environment - while it may be used against slugs and snails, it isn't as effective.

Please note that inhalation of highly-crystalline diatomaceous earth can cause silicosis - always use a dust mask when using this stuff. Also, be aware that diatomaceous earth is just as toxic to helpful predators and other beneficial insects.

 
Don't see what you're looking for? Try our Search function.