I have attached a paper where I describe induced "hyper-sporulation" in two dothideomycetes. This may help.
Using near UV light may help, as well as submerging in water. There are some fungi which will only sporulate once stressed, so after the plate has been covers by mycelia pouring 10ml of sterile water and rubbing the mycelia with pippette tip, then placing under near UV light is sometimes works.
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