[header] How to apply diatomaceous earth outdoors [title] Avoid breathing in or touching the dust particles. [step] Diatomaceous earth is a fine powder, which can irritate your throat if you breathe a lot of it in. Wear a face mask to avoid inhaling the powder, and wear gloves on your hands so that the powder won't dry out your skin. 
[substeps] If you don't have a face mask, you can also wear a bandana or towel over your mouth to keep out the dust. [title] Use diatomaceous earth on plants that truly need it.