During the past two seasons several important destructive fungous diseases of cultivated plants have made their appearance in Iowa, namely: Timothy rust, alfalfa rust, apple canker, and onion smut.
About the middle of July, 1910, there was an abundance of timothy rust in a meadow in the vicinity of Ames; subsequently it was reported from other localities in the state. It was again noticed after the September rains in 1911, especially in the timothy breeding plots.
Pammel, L. H. and King, Charlotte M.
"Four new fungous diseases in Iowa,"
Bulletin: Vol. 11
, Article 1.
Available at: https://lib.dr.iastate.edu/bulletin/vol11/iss131/1