"Yellow dwarf" turned one of Iowa's best oat crops in history for most of the state into one of the worst oat crops in parts of northwestern and southern Iowa. Is it likely to happen again? Here's the story.
Browning, J. A.; Peters, D. C.; and Frey, K. J.
"Virus + Aphids + Oats = Yellow Dwarf of Oats,"
Iowa Farm Science: Vol. 14
, Article 3.
Available at: http://lib.dr.iastate.edu/farmscience/vol14/iss9/3