Area of impact: Leaf
Description: Infection begins on the lower leaves and appears as dark flecks. Later the lesions mature into oval-shaped black blotches usually no more than 1 cm in diameter.
Pathogen involved: Cochliobolus sativus (a fungus)
Timing/Conditions: Late season in moderate to warm wet weather.
Contributing factors: Plants stressed by frost or Hessian fly are at increased risk of infection.
Management practices: Rotate with corn and soybeans, bury wheat stubble and use fungicides and seed treatments.