A series of culture tubes containing 9 ml of sterile water was taken. From the stock culture, 1 ml suspension was transferred aseptically to the 1st tube (10-1) and mixed well. Further serial dilutions were made to produce 10-5 suspensions were made. Suspension (0.1 ml) from each culture tube was spread on sterile soyabean-casein digest medium (SBCD) plates, actinomycetes isolation agar (AIA) medium plates and starch-casein agar medium plates aseptically in a laminar-air flow cabinet. The plates were incubated at 27 ± 2 °C for 84 h. The plates were observed intermittently during incubation.
After 72 h, whitish pin-point colonies, characteristic of actinomycetes and with a clear zone of inhibition around them were seen. The pinpoint colonies with inhibitory or clear zone of inhibition were selected and purified into actinomycetes agar slants. The selected strains were further purified by multiple streaking method. The stock cultures of each selected strain was prepared and maintained in actinomycete agar slants at +4 °C [3,5-7]. The actinomycete colonies isolated from the crowded plate were selected for the further studies and labelled