3.Pathogenicity Test (Koch's postulate)
Pathogenicity of the fungal isolate was tested on plants of Ca. assamicum by infecting the leaves with sporulating culture. The spore suspension was prepared by adding 2 ml of sterilized water to a PDA plate and the conidia were dislodged with a sterile glass rod. To infect the leaves,200 µl of the spore suspension was deposited carefully over each leaf.