Shelf-Life Assessment of Carrier Based Formulations of Trichoderma Mutants

In present study six different substrates (talcum powder, lignite, charcoal, sawdust, compost and fly ash) were used to test the shelf life of the most virulent isolates of Trichoderma harzianum (AkTr₂GM₅) and Trichoderma hamatum (AkTm GM) mutant’s upto 180 days. Maximum cfu/g 154.50 × 10⁶ and 45.50 × 10⁶ were obtained at 30 and 180 days after storage in the Trichoderma harzianum talc-based formulation respectively, and the lowest (16.25 × 10⁶) in fly ash formulation. Furthermore, Trichoderma hamatum talc based formulations exhibit maximum cfu/g values of 156.75 × 10⁶ and 41.50 × 10⁶ at 30 and 180 days after storage, respectively.