Cassie Langstraat wrote:This might be a stupid question but do you put the DE on the ground/soil near the plants that are infested, or just all over the plant, leaves and all?
Ken Peavey wrote:Used as an insulator, DE is close to fiberglass in effectiveness, however the weight would be an issue to consider in wall and ceiling structures.
Donald Hulse wrote:Exactly where do you buy this. Everybody says it's inexpensive but nobody says where they're getting it.
Irene Smith wrote:Diatomaceous earth though it's not the sharp silica, it's still mostly silica. It's insoluble in the lungs. If you inhale it, it's there forever. Unlike biodegradable dust or calcium dust, you body can't break it down. As a potter I get the fear put into me regularly about silica and dusts. I know people who have silicosis and it's very debilitating. I take care to avoid inhaling anything that will get stuck in my lungs forever.
Is DE hazardous? I think so. A quick Google search turns up info about "well-documented pneumoconiosis among diatomaceous earth workers." (pneumoconiosis: a disease of the lungs caused by the habitual inhalation of irritants (such as mineral or metallic particles). It's not poisonous per se. But neither is an anvil.
It also doesn't work at all on the earwigs that eat corn silks. So I'm two thumbs down on DE, ymmv.