Diatomaceous Earth



Food Grade DE Diatomaceous Earth: Natural, Safe Insect Repellent & Feed Additive for all Equines

ADAS trialled and approved for insect control and as a feed additive

The photo shows assorted diatoms as seen through a microscope. These specimens were living between crystals of annual sea ice in McMurdo Sound, Antarctica. Image digitized from original 35mm Ektachrome slide. These tiny phytoplankton are encased within a silicate cell wall.

DE – by DE-sign of nature will:

  • DE-ter parasites
  • DE-flea
  • DE-louse
  • DE-mite
  • DE-bug
  • DE-worm
  • DE-odourise

and is suitable to use on and to feed to all animals – horses, cattle, dogs, cats, sheep, poultry etc and their housing. Can also be used in grain stores & greenhouses (Soil Association permitted for organic use) to deter insect pests.

Safe around animals and in water run off for river and stream life. Can be fed to all livestock and domestic pets regularly. It is an approved feed additive E551 for conventional & organic use.

Suggested Daily Feeding Rates for DE

horses – 50 grammes in daily feed ration (guide for 200kg bodyweight)

cattle – 2% by weight of total dry ration or 50% of free choice minerals

calves – 4 grammes per calf in morning milk

sheep and goats – 2% of the total grain or in the feed ration

chickens, pheasant, turkey, geese etc – 5% in feed, use at full strength in dusting boxes

exotic birds (parrots) – 20 grammes mixed with 20kg seeds and pellets

pigs – 2% in total feed ration

dogs – one tablespoon per day for dogs over 25 kg, one teaspoon per day for small dogs

cats – one small teaspoon per day

What is Diatomaceous Earth – DE?

DE is a very fine powder created from the shells of millions of microscopic creatures called diatoms. Diatoms absorb silicates from the water to create the shells. When they die they sink to the sea bed. Over time sea levels change and layers of DE are exposed and mined.

How does DE work?

DE kills mites, ticks, fleas etc by absorbing the waxy layer which these creatures produce on their outer layers.

How it works within the gut of livestock is not yet understood, as not only does it help feed conversion it is also able to effect the destruction of younger and smaller intestinal parasites and thus reduce the worm burden in animals, giving them a chance to develop their own immunity. It may be something to do with the high dependency of nematode parasites on lipids in the gut of the infested host, as DE has an affinity for these lipids and may be removing them from the gut. It has also been reported to help prevent the development of parasite larvae in faecal droppings on the pasture. There has been much anecdotal evidence of its efficacy in many species.

How long does DE take to kill insects?

DE for Human Use

We have recently been asked about DE for human use – here is a website with more information


Please note we are not responsible for content of others’ websites.

NB: The DE that we sell is food grade and is available in:

  • 1 kg plastic bag
  • 100 g puffer bottle for external application
  • 5 kg plastic pail (special order)

Additional information

Weight N/A

1 kg refill, 5 kg tub, 100 g puffer


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