Industrial, Institutional, Structural, and Health-Related Pest Control
Setting drives the method
Schools, hospitals, restaurants, food plants, warehouses, and offices each impose different label sites, notification rules, and reentry limits. In food-handling establishments, most products may only be applied as crack-and-crevice or spot treatments away from food, food-contact surfaces, and utensils; never spray exposed surfaces where food is prepared or stored. Know what "spot treatment" means on that label - it is usually a small, defined area, not a broadcast.
Tactics
Cockroaches: gel baits, void and crack treatment, IGRs, and sanitation. Ants: locate and treat nests; repellent sprays can cause budding and spread colonies, so non-repellent products and baits are often preferred. Stored-product pests: inspect, discard infested product, then treat voids and cracks. Rodents: exclusion and trapping first, then secured bait stations placed where nontarget animals cannot reach them.
Safety and records
Observe reentry intervals, ventilation, and occupant notification requirements - Maryland schools have specific notice obligations. Keep service records, labels, and Safety Data Sheets available, and follow label directions on containers, application equipment, and disposal.
Traps
The most common errors are broadcast spraying in food areas, treating a surface that later contacts food, leaving bait accessible to children or pets, and using a product labeled only for outdoor use indoors. Also watch for "residential" versus "non-residential" labeling distinctions.
Rule of thumb: in sensitive occupied spaces, treat the smallest possible volume with the least persistent product, placed where people and food cannot contact it.