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Norway Rat

Rodent Control

 

 

The Vector Control Department can not work solve a rodent problem on public property or on private property.  We do not pick up dead rodents. Your local city hall or public works department may be able to assist you with a problem on your private property. 

Secure the services of a professional pest removal company.  Make sure that any professional service you use is licensed, bonded and the service people are certified.

Rat Control Importance

  • Dead and living rats spread disease
  • They contaminate food with urine and droppings
  • Rats start fires by gnawing on electric wires
  • They destroy keepsakes and valuable possessions

Identifying Rodent Problems

  • Rodents are generally most active at night
  • They leave signs such as rub and gnaw marks, burrows, tracks and droppings
  • They need a place to live and food to eat
  • If you remove their shelter and food, rats CAN be eliminated.

Solutions

  • Place food in a feeder, not on the ground
  • Clean up spillage daily
  • Use metal trash cans or approved plastic with tight-fitting lids
  • Keep trash cans covered
  • Clean up fallen fruits and nuts from the ground
  • Remove pet food dishes and leftovers promptly after feeding
  • Clean up animal waste 
  • Remove shelter such as a shed or automobile. Repair or remove them!
  • Seal openings to the house, even above ground level. This includes the garage,openings in the foundations, and the basement floor drain. 
  • Keep doors and windows screened with half-inch mesh hardware cloth.
  • Store lumber, firewood or other materials well off the ground
  • Repair any breaks in the sewer line which connects your home with the main sewer system

Trap Solutions

  • Spring-loaded traps are effective indoors where poisons may pose a threat to people or pets, where poisons are impractical due to the proximity of food, or where recovery of the poisoned rats would be difficult.
  • Trap or glue boards are preferred indoors due to the odor caused by poisoned rats.
  • Traps may be baited with peanut butter or with partially cooked bacon.
  • Mice may be trapped by binding nesting materials to spring-loaded traps. Follow the directions on the trap package for proper placement. Glue boards are another alternative.
  • Any trap should be used according to package instructions!

Poisoning Solutions

  • An effective rat poisoning program requires a fresh, dry supply of bait that is readily available
  • Eliminate all sources of food, forcing the rats to accept the poison as their only food
  • Use properly labeled EPA approved poison rat bait
  • Examples of different active ingredients:
  • Multiple dose anticoagulants: Diphacinone, Warfarin, Pival
  • Single dose anticoagulants: Brodifacoum, Rozol
  • Nerve impulse interceptors: Bromethalin
  • Calcium mobilizers: Cholecalciferol

As long as rodents are eating the bait, the poisoning program should continue. With some poisons, "bait shyness" may develop after several rats have died, so it may be necessary to switch to another poison to eliminate the remaining rats.

For safety and maximum effectiveness, be sure to follow label directions carefully and wear gloves when using any poison.

Always be careful to locate rat bait
out of the reach of children and pets!

Final tips on rodent control

  • Never touch rodents, objects they have contaminated, or rodent poison.
  • Always wear disposable gloves when handling rodents, rodent bait or when cleaning rodent soiled areas.
  • Avoid stirring up and breathing dust in these areas.
  • Wear a mask to avoid breathing dust particles contaminated by rodents.
  • To eliminate dust, use a disinfectant to dampen soiled nesting material and droppings before sweeping.
  • Wash your hands afterwards.

The Norway Rat (Rattus Norvegicus)

  • Is heavy set, light brown to almost black; droppings are capsule shaped, about three quarters of an inch long.
  • Lives about one year, six to twelve "pups" per litter, up to seven litters per year
  • Burrow in the ground, under buildings and rubbish, usually living well within 150 feet of food and water source
  • Requires one ounce of food a day and a half ounce of water
  • Feeds on familiar food, meats and grains, and are cautious of new items or new food.

For additional information, or to request a free inspection for rodent activity, please contact:

Vector Control Office

Phone: 314-615-0680

Note: Saint Louis County Vector Control can work only on public property or easements, and cannot pick up dead rodents. Your local city hall or public works department may be able to work on private property. Or look in the Yellow Pages under “Pest Control”. Make sure that anyprofessional service you use is licensed, bonded and the service people are certified.