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Control tips for European corn borers issued by Iowa State College
Dr. H M Harris and staff release 1949 recommendations adapting to Iowa and Town State College findings. Timing shifts to 60 egg masses per 100 plants and corn 25 inches tall for first brood, with a second application 7 10 days later if needed. Second brood treated in late planted corn when 100 egg masses per 100 plants or more, with August timing. DDT remains primary, other options include Ryania and Parathion experimentally. certain chemicals are not recommended. Equipment guidance favors low to high pressure sprayers and dusters, with dilution to 2 to 6 gallons per acre depending on method.
MENTIONED IN THIS ARTICLE
H. M. Harris
Department of Entomology
Town State College
Harris
New York
Canada
Iowa
Iowa State College
Harria