American Cockroach
Periplaneta americana
CockroachesLarge reddish-brown cockroach, 1-1/2 to 2 inches long. Also called 'waterbug' or 'palmetto bug'. Has a yellowish figure-8 pattern on the back of the head. Prefers warm, damp areas like basements and sewers. Strong flier. Egg case (ootheca) contains about 14-16 eggs (significantly fewer than German cockroach). Chewing mouthparts.
Control Methods
Recommended methods for controlling this pest
| Method | Type | Effectiveness | Requirements |
|---|---|---|---|
| Gel Bait Application for Cockroaches | Chemical | Required | |
| HEPA Vacuum Removal | Non-Chemical | None | |
| Door Sweep Installation | Mechanical | None | |
| Pipe Penetration Sealing | Mechanical | None | |
| Cabinet Gap Sealing | Mechanical | None | |
| Sticky Trap Monitoring | Non-Chemical | None | |
| Boric Acid Dust Application | Chemical | Required | |
| Clutter Reduction | Cultural | None | |
| Food Storage in Sealed Containers | Cultural | None | |
| Non-Repellent Residual Spray | Chemical | Required | |
| Crack and Crevice Aerosol | Chemical | Required | |
| Insect Dust Application to Voids | Chemical | Required | |
| Microencapsulated Formulation Application | Chemical | Required | |
| Threshold and Sweep Inspection and Repair | Mechanical | None | |
| Weep Hole Vent Installation | Mechanical | None | |
| Expansion Joint Sealing | Mechanical | None | |
| Drainage Correction Recommendations | Cultural | None | |
| Glue Board Monitoring Stations | Non-Chemical | None | |
| Drain Gel and Foam Treatment | Chemical | None |
Common Harborage Locations
Where to find this pest during inspections
| Location | Why Found There | Priority |
|---|---|---|
| Under Kitchen Sinks | Moisture from leaks and condensation, warmth from drain water, darkness, food debris washed down, and minimal disturbance. | Critical |
| Under Bathroom Sinks | High humidity from sink use, plumbing leaks, standing water in cabinet bases, warmth from hot water pipes. | High |
| Behind Toilets | Difficult to clean area, moisture from condensation and leaks, warmth from water supply, protected location. | High |
| Bathtubs & Shower Surrounds | Constant moisture, warmth, gaps in grout and caulking, access to wall voids, poor ventilation. | Medium |
| Basements | High humidity, cooler temperatures, stored items, potential for flooding, entry point from outside. | Critical |
| Crawl Spaces | Direct earth contact, very high humidity, minimal disturbance, abundant hiding spots, poor ventilation. | Critical |
| Behind Refrigerators | Consistent warmth from compressor motor, moisture from condensation, food debris falls behind, difficult to clean. | Critical |
| Behind Stoves | Heat from cooking, grease splatter, food debris, limited cleaning access, constant warmth. | Critical |
| Under Dishwashers | Warmth from motor, moisture from leaks and steam, food particles, dark protected space. | High |
| Floor Drains | Constant moisture, organic matter accumulation, connection to sewer system, warm environment. | High |
| Sewer Lines & Cleanouts | Direct access from outside, moisture, organic matter, protected pathway into structure. | High |
| Outdoor Dumpsters | Massive food source, warmth from decomposition, moisture, protection from elements. | Critical |
| Floor-Wall Junctions | Natural collection point for debris, provides shelter, and travel routes. | Medium |
| Drop Ceilings | Undisturbed environment, warmth from lighting, provides routes between rooms. | Medium |
| Exterior Foundation | Entry points to structure, protection from weather, moisture accumulation. | High |
| Door Thresholds | Common entry point, gaps under doors, light attraction, temperature differential. | High |
| Storage Boxes & Clutter | Undisturbed environment, material for nesting, harborage between items, food source (cardboard/paper). | Medium |
Important Disclaimer: The information provided in this knowledge base is for educational and reference purposes only. Pest management professionals should always consult current product labels, Safety Data Sheets (SDS), manufacturer instructions, and applicable local, state, and federal regulations as the definitive source of truth. Product formulations, application methods, safety requirements, and regulations may change over time. This information may be out of date and should not replace professional judgment, proper training, or required licensing and certifications.