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Spot blotch

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.

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