There are nearly always insects in our forage crops; sometimes they're serious, other times not. With the newer insecticides, however, we need not stand by and watch then take over when they do become serious.
Walstrom, R. J. and Lilly, J. H.
"Protect Forage Crops From Insects,"
Iowa Farm Science: Vol. 9
, Article 3.
Available at: https://lib.dr.iastate.edu/farmscience/vol9/iss11/3