German cockroaches favor warm, humid spaces near food and water — kitchens, behind appliances, under sinks — and Dysart's a humid continental climate with hot, humid summers and cold winters, somewhat more humid than western Iowa given the Mississippi River's influence keeps them active most of the year. American cockroaches, larger and reddish-brown, prefer basements, drains, and utility rooms. A blend of established manufacturing-era neighborhoods and newer suburban growth along the Mississippi River corridor.
We start with an inspection to identify the species and the source — sanitation issue, moisture problem, or entry point. Treatment centers on gel bait placed in cracks, voids, and under appliances, not broadcast spraying, since German cockroaches in particular have developed resistance to many surface sprays. A follow-up visit confirms the bait is working and the population is dropping.