German cockroaches favor warm, humid spaces near food and water — kitchens, behind appliances, under sinks — and Pennville's a humid continental climate with milder winters than northern Indiana, given the region's more southern position along the Ohio River keeps them active most of the year. American cockroaches, larger and reddish-brown, prefer basements, drains, and utility rooms. A blend of established hill-country homes and newer suburban growth tied to the region's university and manufacturing base.
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.