Leaves of phytoplasma-infected and healthy grapevines were treated with indole-3-butyric acid. The effect of IBA was examined by testing the grapevine for presence of phytoplasma 16S rDNA and by measuring stress parameters before and after the treatment. Vines treated with IBA showed signs of recovery, but high incidence of natural recovery was also observed among untreated vines in the same experiment. In naturally-recovered untreated plants, higher levels of H2O2 were measured, while in IBA treated plants recovery was not correlated with higher H2O2 levels after the treatment. Other biochemical parameter measurements, lipid peroxidation and total phenolics, did not show difference between the groups of vines tested.