PCR products (~1.7 kb) amplified with F1/B6 primers were obtained from two samples of sweet cherry showing leaf roll and yellowing of the leaves and one sample from sour cherry (cherry XVI.12) with shoot proliferation and dieback symptoms. Products of the nested PCR with R16(X)F1/R1 primers specific for apple proliferation (16SrX group) were obtained for 16S rDNA of phytoplasmas from two sweet cherry trees. Phytoplasma rDNA fragments of phytoplasmas from cherry XVI.12 was
amplified by nested PCR with primer pair R16(I)F1/R1 specific for aster yellows group, but not with apple
proliferation-specific primers.