WARNING ! ! ! !
   
  I just checked this site and the Perma-Guard ISN'T FOOD GRADE DE!  IT is 
mixed and CANNOT be taken internally!  This is an insecticide sold under the 
Trade Name.  It is purportedly natural and not chemical.  They make no claim 
for Food Grade.

  From the site:
    "Perma-Guard kills by physical action, not chemical--by puncturing the 
insects exoskeleton and absorbing its body fluids, thus posing no harm to 
warm-blooded life. The addition of Pyrethrum and Piperonyl butoxide is to 
irritate the bug, causing physical action, allowing the DE to work more 
quickly. Birds who eat bugs get 14 extra trace minerals. "

   
  Bill Keen
  
cking...@nycap.rr.com wrote:
  Jill,
Thanks for the report on your success' with DE. A most interesting
read!
The blower is a great idea. 
I normally use DE around the foundation to keep ants out of the house,
and using your method, it would be much quicker and easier.