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How to Manage Pests

Quick Tips for Managing Home and Landscape Pests

Rats banner
roof rat
For more information see our Pest Notes on Rats, or contact your local Cooperative Extension office.

Rats are some of the most troublesome and damaging rodents. They eat and contaminate food, garden produce, and fruit as well as transmit diseases to humans and pets. Manage them by removing food and shelter, eliminating entryways into buildings, and trapping.

Indications of a rat infestation

  • Rat droppings in garages, storage buildings, attics, or around pet food containers.
  • Rodent feeding damage on fruit/nuts in or falling from trees in your yard.
  • Rat nests behind boxes, in drawers in the garage, or in woodpiles.
  • Burrows beneath the garbage can, compost pile, or among garden plants.
  • Rats traveling along utility lines or on fence tops at dusk.

Identify the rat: Is it a roof rat or a Norway rat?

  • Norway rats are stocky rats that build burrows along building foundations, beneath rubbish, or in woodpiles. Indoors they tend to remain in basements or on the ground floor.
  • Roof rats are agile climbers with a tail that is longer than their head and body. They usually live and nest above ground in shrubs, trees, or dense vegetation. Indoors they favor attic spaces, walls, false ceilings, and cabinets.

Roof rat and Norway rat differences

To get rid of rats, remove food, water, and shelter and seal entryways!

  • Feed pets only the amount of food they will eat at a single feeding.
  • Keep garbage, trash, and garden debris in receptacles with tight-fitting lids.
  • Thin dense vegetation and create at least a 2-ft. space between shrubs and between shrubs and buildings.
  • Thin or remove climbing hedges from buildings.
  • Remove tree limbs that are within 3 ft. of a roof.
  • Seal all crack and openings in the house’s foundation that are larger than 1/4 inch.
  • Make sure doors, windows, and screens fit tightly.

Remove rats from the home by trapping

  • Snap traps are the safest, most effective and economical way to trap rats.
  • For Norway rats, place traps close to walls, behind objects, in dark corners, and in places where rat droppings have been found.
  • For roof rats, place traps in off-the-ground locations such as on ledges, shelves, branches, fences, pipes, or overhead beams.

What about baits?

  • Avoid using baits indoors because dead rats create bad odors.
  • Seal buildings before baiting outdoors to prevent poisoned rats from coming indoors to die.
  • Place baits in tamper-proof bait stations and secure them from children and pets.
  • All rodent baits are toxic to pets.

Minimize the use of pesticides that pollute our waterways. Use nonchemical alternatives or less toxic pesticide products whenever possible. Read product labels carefully and follow instructions on proper use, storage, and disposal.

What you use in your landscape affects our rivers and oceans!


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2008 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. /QT/ratscard.html revised: April 14, 2008. Contact webmaster.