A liquid antifungal product has been developed using the strain Streptomyces sp. TT-3 and validated in commercial Tea Estates of Assam for the application against major foliar tea fungal diseases. The product is effective in control of Fusarium Dieback, Black Rot (causal agent, Corticium sp.), Red Rust (causal agent, Cephaleuros sp. in both stem and leaf) and Mealy-Bug in ommercial Tea Estates. Mass scale production process for the strain TT-3 is standardized.