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Scab (Fusarium Head Blight)


© Kansas State University, Department of Plant Pathology

Pathogen(s) causing disease:

Fusarium graminearum

Symptoms:

Spikelets appear bleached often with a pale pink tint, tombstone kernels, seed light weight, sometimes infected spikelets are barren and can produce mycotoxin, seedling blight.

Conditions:

 It is a common problem in Europe, Asia, South Africa and the Midwestern and Eastern US. Scab severity is very erratic and depends heavily on wet weather conditions. Scab can reduce both yield and quality of the grain.  Disease development is favored by warm, moist conditions during and shortly following flowering, may be more severe where wheat follows corn because the pathogen also causes Giberella ear and stalk rot.

Management:

Crop rotation, seed treatments for seedling blight phase, bury infected residues by plowing.

Sources:

Kansas State University
Purdue University

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