Apr 04, 2013 - 04:30 PM
If the house was treated prior to 2000, then whatever was used at that time is probably not there anymore. My guess is Dursban TC, Dragnet, maybe even Premise. But whatever, it needs retreatment or what is called a "booster treatment", kind of like a booster shot.
I would recommend a complete retreatment with Termidor SC. Termidor SC will last 15+ years and will have an overall impact on the termite colony and not just kill the workers.
Most professional pest control companies have been using Termidor SC since 2000, a newer cheaper "generic" or "post patent" fipronyl product is Taurus SC. Here are the links -
Taurus SC - http://www.epestsupply.com/product/72...
If you need help on how to apply these products, visit this page - http://www.epestsupply.com/termite_treatment_methods.php#
You can always email me for specific questions. Hope this helps.