German cockroaches favor warm, humid spaces near food and water — kitchens, behind appliances, under sinks — and Browerville's a humid continental climate with brief, warm summers and long, brutally cold winters, more severe than the Twin Cities the farther north you go keeps them active most of the year. American cockroaches, larger and reddish-brown, prefer basements, drains, and utility rooms. A blend of older agricultural-area homes and small-town construction spread across this sparsely populated region.
Treatment starts with locating the harborage points — the tight, warm, food-adjacent spaces roaches actually live in — and applying gel bait directly there rather than spraying open floor space. This targets the colony at its source and avoids the resistance issues that plague over-the-counter sprays. We follow up to verify the population has collapsed, not just scattered.