Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 media. Imidacloprid (IMI) is a widely used systemic insecticide to control plant pests following soil, seed or foliar applications, and is subject to cleaning. Bioremoval is one of the economical water treatment techniques in remediation. Trials were carried out at pH 7.5 for IMI at media with and without triacontanol (TRIA), a naturally occuring plant hormone and Salicylic acid (SA). The removal capacities of Synechocystis sp. and Phormidium sp. were found higher in media containing TRIA and Salicylic acid. The removal efficiencies were measured at 150 mg L -1 concentrations of IMI. Synechocystis sp. and Phormidium sp. had the maximum values of removal of IMI in the media containing the hormone and Salicylic acid. The results showed that TRIA and Salicylic acid could be considered as a stimulant in pesticide removal by the isolated cyanobacteria cultures.