Initially, the dietwas treated with 200 mL of one of 5 solutions based
on treatment group: water (untreated group), 5% ampicillin (w/v),
5% kanamycin (w/v), 5% metronidazole (w/v), or 2.5% tetracycline
(w/v). These concentrations were determined to be sublethal to
termites based on extensive preliminary optimization studies.