Screen and Identification of Insecticidal Antibiotics Producing Strain and Studies on the Stability of Bioactive Substances
一株杀虫抗生素产生菌的筛选、鉴定及活性物质稳定性研究

By using Brine Shrimp as primary screening assay and silkworm as second screening assay, the strain of GX-29 which with high insecticidal activity substances were selected from the soil. It was identified as Streptomyces fulvissimus based on physiological and biochemical characteristics and 16S rDNA sequence analysis. The insecticidal stability was also studied by means of Brine Shrimp tracking activity. The result shows that temperature, ultraviolet are not greatly affected the insecticidal activity, and its bioactivity kept steady in neutral and slight alkaline condition.