Symptoms of Phoma leaf spot on table beet. Note the small, pinhead size, dark fruiting bodies (pycnidia) of the pathogen on the dead tissue in the larger lesions.

Symptoms of Phoma leaf spot on table beet. Note the small, pinhead size, dark fruiting bodies (pycnidia) of the pathogen on the dead tissue in the larger lesions.

Photo Source: Lindsey du Toit, Washington State University