Insect outbreaks depend largely on the weather during the growing season. Temperature, rainfall, soil moisture and humidity all are important. Here's the forecast for 1958, depending on the weather.
Gunderson, Harold and Lilly, J. H.
"Insect and Rodent Prospects for 1958,"
Iowa Farm Science: Vol. 12
, Article 3.
Available at: https://lib.dr.iastate.edu/farmscience/vol12/iss7/3