Streptomyces is the largest genus of Actinobacteria that forms fungus-like branched networks of hyphae. Streptomyces has been clinically important because they produce various secondary metabolites with antibacterial, antifungal, and nematocidal activities. In order to explore novel insecticidal compounds, extracts from 363 strains of Actinobacteria were screened for their juvenoid and anti-juvenoid activities using yeast-two hybrid system. Among them, extract of Streptomyces spp. showed high anti-juvenoid activity. This extract also showed high level of insecticidal activities against larvae of Aedes albopictus, Laodelphax striatellus, and Ostrinia furnacalis. These results suggested that the secondary metabolites of Streptomyces could be natural sources of novel insecticidal compounds.

• Min Gu Park(Department of Agricultural Biotechnology, Seoul National University)
• Jong Hoon Kim(Department of Agricultural Biotechnology, Seoul National University)
• Jae Young Choi(Research Institute for Agriculture and Life Sciences, Seoul National University)
• Seok-Hee Lee(Department of Agricultural Biotechnology, Seoul National University)
• Ying Fang(Department of Agricultural Biotechnology, Seoul National University)
• Dong Hwan Park(Department of Agricultural Biotechnology, Seoul National University)
• Ra Mi Woo(Department of Agricultural Biotechnology, Seoul National University)
• Woo Jin Kim(Department of Agricultural Biotechnology, Seoul National University)
• Dong-Jin Park(Microbial Resource Center, Korea Research Institute of Bioscience & Biotechnology)
• Chang-Jin Kim(Microbial Resource Center, Korea Research Institute of Bioscience & Biotechnology)
• Yeon Ho Je(Department of Agricultural Biotechnology, Seoul National University)