Diatomaceous Earth

[RayR]

Originally Posted by Hermitian

The sale and use of DE for pest control in California is illegal -- and for good reasons. Cesar Chavez was a major proponent of the ban.

Do you have any links to verify that? I've not heard of any bans on food grade DE for pest control anywhere. There may be some local ordinances as far as disposal of filter grade DE.

Originally Posted by Sun City Linda

I purchased a bag of DE in the garden section of a national retailer last year. What else would it be used for in gardening if not pest control?

The finely powdered form of fresh water DE doesn't have much practical use in the garden outside of pest control that I'm aware of, and to be effective as a soft bodied pest killer or a deterrent it must be dry.