Effect of oxytetracycline (OTC) on pesticide removal was assayed in a biomixture.
Biomixture respiration was mostly stimulated with the application of OTC.
Chlorpyrifos mineralization improved at low OTC doses, resembling a hormetic effect.
The biomixture was able to remove three herbicides simultaneously.
During herbicide removal, OTC co-application only increased the half-life of ametryn.