Claviceps- An ergot fungus belonging to ascomycetes that grow on the ears of rye and related cereal and related forage plants
Puccinia- Belonging to basidiomycetes and are obligate plant pathogens known as rusts.
Trichoderma- Belonging to Deuteromycetes which includes fungi with septate mycelia in which perfect stage (sexual stage) is missing thus called fungi imperfecti.