Research test plots and results obtained by farmers who left check strips show that spraying with insecticides is a good way to kill corn borers.
Gunderson, Harold and Lilly, J. H.
"It Pays to Spray For Corn Borers,"
Iowa Farm Science: Vol. 4
, Article 5.
Available at: https://lib.dr.iastate.edu/farmscience/vol4/iss7/5