The season was right for Iowa to have a record oat crop in1946, but it was only aerage and many of you probably know the cause-the new blight and root rot disease- Helminthosporium. It cut the tields of many fields, some in half.
Murphy, H. C.
"That New Oat Disease,"
Iowa Farm Science: Vol. 1
, Article 2.
Available at: https://lib.dr.iastate.edu/farmscience/vol1/iss4/2