In the spring, the primary inoculum is thought to be conidia, which are produced from pycnidia, and are dispersed by rainsplash to infect leaves.

Leaf spotting symptoms are often associated with high humidity, warm temperatures, dense foliage, and leaves in contact with soil.

These include: crop rotation, fungicide application, variety selection, irrigation management, tillage to reduce residue, and good grassy weed control.

[5] Fungicides that are listed as providing 'Very Good' control of Septoria leaf blotch include Azoxystrobin 22.9%, Pyraclostrobin 3.6%, and Propiconazole 41.8%.

Symptoms are often observed later in the season, towards the end of grain filling, when disease is unlikely to cause significant yield loss.

[2] Ascochyta can also cause leaf blight of turf grasses, so its importance is not limited to cereal grain crops.

[9][10] Ascochyta leaf blight of turf has become a common, although minor, disease of Kentucky bluegrass lawns in the United States.