Thank you all. @Salam and @Rushikesh please let me know did you people applied your concentrations in the wells or on discs first and then kept the fungus for growth or firstly spread the fungal spores as like bacteria and then made the wells?
Instead of spreading your fungal culture on plate, you should make a seed plate agar having desired CFU of your culture and then pour it in Petri dish. Allow the plate to solidify and then make a well or disc whatever it is. Then keep the plates in refrigeration for 1-2 hours to allow the content in the wells diffuse freely through the agar. And then incubate it.