(Undated) -- There are signs an annual pest has started feasting on some of Iowa's corn crop. Iowa State University Extension Agronomist Megan Anderson is sharing photos of damage she says is likely caused by raccoons. She says the tell-tale signs are broken stalks, torn down, tossed around, and ears cleaned of any corn. She says raccoons will often find a corn variety they like and continue causing damage for several rows. She also says racoons can be hard to manage.