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National Wildlife Control Training Program vol. 1.

Norway Rat Control

Scientific Name: Rattus norvegicusNorway rat  Rattus norvegicus


  • Rats eat about 1/2 oz per day.
  • Rats can enter 1/2-inch holes.
  • Can climb 
  • Does not hibernate.
  •  Rats are active at night
    Photo Credits: Chuck Dickerson



Rat gnaw marks
Description: Rats can easily gnaw through wood.


  • Damage eat and contaminate stored grains, seeds, pet foods; gnaw wiring, structures; poultry; disease hazard

Control Methods

Your objective should be to determine rodent populations by looking for droppings, tracks, and gnawings or by baiting. Simultaneously set control techniques, rodent-proof and sanitize areas, reducing or eliminating potential rat foods and water.

Habitat Modification

  • Remove food and water sources, such as bird feeders and dripping faucets. Store potential foods in plastic containers with tight fitting lids or on pallets.
  • Secure buildings to prevent rat entry.

Copper stuf-it used to fill voids. copper "wool"
Description: A handy non-rusting material used to rodent-proof where pipes enter buildings. It isn't rodent proof but it can be used to help fill cracks and crevices to reduce the ease of rodent entry.




Frightening Devices

  • Sonice devices have not proven to be effective. Rats quickly adapt to novel sounds.
  • Dogs and cats have limited value.


  • None found to be effective. 


Rat killed by a rat snap trap with expanded trigger.
  • Snap traps with regular or expanded triggers are effective. follow up sanitation & rodent proofing
  • Multiple catch rat traps are less effective as rats don't exhibit the same characteristics as mice.
  • Cage traps can work on rats but are more costly and time consuming.



  • Maintain a continuous supply of anticoagulant bait for 15 days or as directed by the label. Place anticoagulant or other baits in stations. Anticoagulants might include the following active ingredients: brodifacoum, bromadiolone, chlorophacinone, diphacinone, pindone, warfarin. Non-anticoagulants might include bromethalin, cholecalciferol.


University Publications

Prevencion Y Control Las Ratas de Noruega--Dept. de Salud Publica de Illinois

Prevention & Control of Norway Rats--Illinois Dept. of Public Health 

Non-Chemical Rodent Control--Univ. of Florida

Rats (includes Norway and Roof Rats)--University of California



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