Pleospora herbarum

Pleospora herbarum is a species of fungus in the family Pleosporaceae. It is a plant pathogen infecting several hosts including alfalfa, apples, asparagus, tomatoes, citruses and chickpea. It has a cosmopolitan distribution, and is common in temperate and subtropical regions. The fungus was first described under the name Sphaeria herbarum by Christian Hendrik Persoon in 1801.