Cockroaches

The sight of a cockroach running around in the kitchen cupboard may be familiar to some, but you don't have to live with them. Cockroaches can eat food items in your home, including crumbs trapped in cracks and spilled drinks. While they don't generally bite people, cockroaches shed, and their waste products can get into the air you breathe. Indoor cockroach infestations may cause allergy and asthma symptoms to get worse.

Control tips:

• It's important to determine which species of cockroach you have. Use a cockroach identification guide or contact your local county extension office for help identifying the cockroaches.
• For example, limiting moisture can deter German cockroaches, but you might want to adjust both temperature and humidity to control American cockroaches.
• Find out where the cockroaches are hiding, where they travel, and what they are eating and drinking. Use the resources below to learn how to monitor their activity.
• Monitor and assess cockroach activity using sticky traps or glue boards. This can identify problem areas in your home.
• Cockroaches like dark crowded spaces. Monitoring efforts should include bathrooms, kitchens, and dark places, such as under cabinets, sinks, appliances, in wall voids, and on pipes. Tight cracks 3/8 inch or smaller are suitable hiding places for cockroaches.
• Consider using Integrated Pest Management (IPM) strategies first before choosing a pesticide. Here are some IPM tips:
• • Deny them access to food and water by repairing leaks, removing clutter, and ensuring the kitchen and the sink are clean every night.
  • Prevent roaches from entering your home by sealing cracks and crevices around cabinets, backsplashes, windows, doors, crawl spaces, pipes, wires, and cables. Use silicone caulking, screening, and/or copper mesh.
  • Clean areas of cockroach debris such as dead cockroaches, eggs, and feces. Cockroaches are attracted to their own debris.
• If you decide to use a pesticide, always read and follow the label directions carefully.
• Some pesticides might repel cockroaches, rather than kill them. Make sure you're not chasing the cockroaches into other rooms or apartments.
• Some cockroaches have become resistant to certain pesticides, and/or are averse to eating certain baits and gels. Using an IPM approach can reduce pesticide resistance.
• If you are using a pesticide in addition to IPM and it is ineffective, pesticide resistance or aversion may be an issue.
• Consider switching to a product with a different active ingredient.
• If using baits, consider switching brands. This may address aversion, or roaches avoiding the bait because they do not like the flavor or other ingredients.
• Make sure to dispose of any unwanted pesticide according to the label directions.
• After the cockroaches have been eliminated, continue prevention and maintenance practices to keep them out.
• Use the links under the "Learn More" tab for resources about specific species of cockroaches.

If you have questions about this, or any pesticide-related topic, please call NPIC at 800-858-7378 (8:00am - 12:00pm PST), or email us at npic@ace.orst.edu.

Cockroaches

• Identify the cockroach species before choosing a treatment strategy. Effective options can differ by species.
• Use traps to monitor cockroach activity. Make sure to check these daily.
• Clean the kitchen and eating areas before bed and never leave dishes with standing water in them.
• Vacuum cracks and crevices around the home at least weekly to eliminate food sources.
• Secure pet food and water in sealed containers overnight.
• Fix leaky pipes to eliminate water sources.
• Store recycling and garbage in bins with tight fitting lids and empty frequently.
• Store food items in sealed, cockroach-proof containers. Cockroaches can chew through paper, cardboard, and thin plastic.
• Caulk or seal cracks and crevices, and reduce unnecessary clutter around your home to eliminate hiding places.
• Vacuum up cockroaches. Place the vacuum bag in a sealed bag promptly. You can also freeze the vacuum bag to kill them.
• If you live in an apartment, work with your neighbors and landlord. Nobody will be able to eliminate the problem alone.
• If you choose to use a pesticide, read the label before you buy. Try a lower toxicity product first.
• If you have a pesticide product in mind, have your label handy and click here for information about that product.

County Extension Offices

Through its county agents, the Cooperative Extension Service gives individuals access to the resources at land-grant universities across the nation. These universities are centers for research in many subjects, including entomology (the study of insects) and agriculture. Each county within the United States has an Extension office, which is staffed with agents who work closely with university-based Extension specialists to deliver answers to your questions about gardening, agriculture, and pest control. You can find the phone number for your local county extension office in the local government section (often marked with blue pages) of your telephone directory or by clicking on the map below.

Additional Resources:

• Bait & Growth Regulator for Cockroaches (infographic) - California Department of Pesticide Regulation
• Seasonal Outdoor Cockroach Management Tips (video) - California Department of Pesticide Regulation
• Got Roaches? Eliminate Roaches with IPM - PennState Extension
• Cockroach Publications - University of Florida Extension
• Cockroach Control Manual - University of Nebraska-Lincoln
• A Practical Guide to Cockroach Management in Multi-Family Housing Units - Purdue Univeristy Extension
• Understanding Cockroach Control - Clemson University Extension
• Cockroach Elimination in Homes and Apartments - University of Kentucky
• How to Manage Cockroaches - University of California Statewide IPM Program
• Safer and Effective Cockroach Control for Buses and Trains - California Department of Public Health
• Foggers - Washington State Department of Health

Information on specific species:

American Cockroaches

• American Cockroach - Michigan State University
• American Cockroach - Utah State University Extension
• American Cockroach, Periplaneta americana - University of Florida Extension
• American Cockroaches - PennState Extension

German Cockroaches

• German Cockroach - Utah State University Extension
• German Cockroaches - PennState Extension
• Cockroaches - University of Maine Cooperative Extension

Oriental Cockroaches

• Oriental Cockroach - Utah State University Extension
• Oriental Cockroach - PennState Extension
• Oriental Cockroach - University of Florida Extension