All organisms have been previously identified morphologically as belonging to the genus Streptomyces, and eight out of the 13 strains tested have been previously identified using molecular methods ( Table 1).5 The remaining strains, AD G35 3A 29, AD G35 3A 40, AD G35 3B 14, AD 3A 26, and AD G31 13A 69, were identified in this work using 16S rDNA sequencing. Actinobacterial isolates were grown for three days at 27 °C in Czapek–Dox medium. DNA was extracted as previously described16 and amplified using the primers 9F (5′ GAGTTTGATCCTGGCTCAG 3′) and Sm5R (5′ GAACTGAGACCGGCTTTTTGA 3′). Denaturation of DNA was performed at 95 °C for 5 min, followed by 30 cycles of 45 s at 94 °C, 45 s at 65 °C, and 1 min at 72 °C, and a final extension of 10 min at 72 °C.15 Polymerase chain reaction products were purified and sequenced using an ABI 3130 sequencer (Applied Biosystems)