Studies on Fungicidal Activity and Liquid Fermentation Optimization of Streptomyces Strain 4301

Streptomyces strain 4301 was isolated from the soil.Metabolites produced by this strain showed fungicidal activity.The diameter of inhibitory cycles of Peronophythora litchii affected by Streptomyces strain 4301 was 25.5 mm in solid culture.Optimal fermentation conditions and medium of liquid culture for Streptomyces strain 4301 were investigated.The results indicated that the optimal fermentation medium and conditions were as follows:glucose 2%,soluble starch 2%,beancake powder extract 3%,protose peptone 0...