Granular and powder describe physical formats, not a ranking of biological quality. Choose according to the directions, viable organism and application method. MegaMyco is a granular product for root-zone placement; do not assume it is suitable for a dripper or spray system.
Keep the context.
Biological compatibility, successful colonisation and a measurable plant response are different questions. The growing conditions matter, and general research is not a promise of a particular result with MegaMyco.
References
Read the biology at its source. These references describe general science and study-specific findings.