Hi Brooks. Here in south Texas, where fire ants are rampant, we found that the best way was to sprinkle some DE around the mound, then stir the mound up to get zillions of them to come buzzing out of the mound, then while they are swarming around the mound dump a bunch more DE on.
Only the very largest mounds needed another 'dose' the next day, but those were rare and always after the second dose they were gone. Whether all dead or moved away, I don't know, but the mound would be done with and they never built close to that area with a new mound. Samala, Renee -------Original Message------- our research using amorphous diatomaceous earth revealed that NOTHING WE EMPLOYED equaled the ability to incite fire ants to move to another location