Is This Normal College Guy Behavior?

…or should I have a talk with my roommate about this?

I rent a room in my house and my roommate eats almost all of his meals in his bedroom. He will leave plates with food on them, styrofoam boxes open with food in them, and crumpled pieces of trash like napkins, food bags, etc. on the floor. I have told him once that I am not trying to attract roaches or ants into my house (a problem here in the south)! Should I lay off it and accept this as normal college guy behavior or do I have the right to bring this up with him? I just do not leave food out and think it is disgusting, but I don’t want to nag him over something that shouldn’t be a big deal or over react.