The fungal genus Pyrenophora includes 108 species, including the following plant pathogenic species: Pyrenophora teres, Pyrenophora graminea and Pyrenophora tritici-repentis.

Pyrenophora teres (has the teleomorph, Drechslera teres) makes up to 3 conidia per conidiophore. It infects plants with an appressorium. It grows bio-trophically in the first infected plant cell, but then switches to a necrotrophic growth mode. During necrotrophic growth, the fungus can only be found in the plant apoplast but not within plant cells.

...