Plant diseases have damaged our crops just about as long as crops have been grown. It's not likely that 1957 will be an exception. How badly they'll damage this year's crops depends a lot on the weather coming up.
Shurtleff, Malcolm C.
"Plant Disease Outlook for 1957,"
Iowa Farm Science: Vol. 11
, Article 5.
Available at: https://lib.dr.iastate.edu/farmscience/vol11/iss7/5