Since my effort to control Crazy ants is ongoing I will report this. Texas A&M Univ. reports that there is at present;
"Effective products involved with the treatments are not readily available to the consumer. If you suspect your house or property is infested with these ants, call a professional pest control provider. After treatment, or when making multiple applications over time, piles of dead ants must be swept or moved out of the area in order to treat the surface(s) underneath.
**Note for Professional Pest Management Personnel: According to the Texas Department of Agriculture, the following products have received expanded use approval through a Section 18 Quarantine Exemption from the Texas Department of Agriculture (TDA) and the Environmental Protection Agency (EPA) for the control of these ants. These are only available for use in counties with confirmed infestations of the Rasberry crazy ant. See product labels and supplemental labels for specific use directions: This exemption will expire on October 21, 2012.:
http://urbanentomology.tamu.edu/ants/rasberry.html
So, my problem with Crazy or Rasberry ants may not match your ant problem.
To date:
Tanglefoot is rapidly (one day) breached. TOTALLY covered!
Water Barrier; Works but is a pain and drowns bees. (not practical for one of two hives)
Oil barrier; Same as water.
Boric Acid; They drink the stuff like good wine and just keep coming.
TERRO; Bait and dry broadcast; under test today
Diatomaceous earth ; Under test today.
Best defense so far? Bees! They seem to be holding the fort BUT, if this fight does not come my way then I will abandon the site. (Further note, one, the TBH seems to have the biggest problem and is the weakest hive. The Lang seems stronger and less molested. Both were started with 3 lb packages this spring. Could be the ant fight.)
Results to date; Ants 7, me 0.

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