diatomaceous earth - Knowledgebase Question

lancaster, Ca
Question by davidbutch
February 21, 2009
will diatomaceous earth kill my earthworms if I mix it in my vegetable garden soil?


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Answer from NGA
February 21, 2009

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Diatomaceous earth is generally used on the soil surface as an insecticide rather than as a soil amendment. When dusted on the soil surface it deters snails and slugs. When mixed into a slurry with water it can be "painted" on tree trunks to repel ants and adult borers. I'd save it to use against pests. You can amend your garden soil with compost, leaf mold, or aged-manure to improve the tilth.

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