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About rats

Last Updated August 4, 2021

Points for the removal of rats

Rats not only threaten human health, but also cause great damage to our lives.
Let's get rid of it after fully understanding the habit of the mouse.

What kind of animal is a rat? Type and Ecology

In Japan, more than 20 kinds of rats are known.
The following three types are found in and around the house.

About the type and characteristics of mouse
Type Rat Rat Rattle
Body length 20~25cm 17~20cm 6~9cm
Weight Approx. 300g Approx. 200g About 30g
Ear The earlobe is thick and small The earlobe is large The earlobe is round and large
Length of the tail Shorter than body length Longer than body length Almost the same as body length
Habitat Sewage, underfloor, garden Indoors, behind ceilings, inside buildings Houses, agricultural land, rural areas

Damage of rat

Hygiene damage

  • Salmonella bacteria in the excrement of rats cause food poisoning.
  • It is stabbed by a mite that is infested in the mouse and causes itching.

Physical and economic damage

  • It causes damage by biting furniture and food.
  • Twigs wires and gas pipes to create a cause of power outages and fires, or use computer cables to paralyze functions.

You can get rid of it!

The basis of rat extermination is "environmental improvement", which is to create an environment where rats are difficult to live.
Extermination using equipment and chemicals is effective only after taking environmental measures.

Creating an environment where rats are difficult to live (environmental control)

Eliminate food that feeds

  • Store the food in a container with a lid.
  • Let's keep the kitchen clean.
  • Let's not leave kitchen garbage or water.

Block the entrance

  • Apply wire mesh to drains, vents, etc. so that rats can not enter.
  • Block holes in the pipes, around the introduction of the air conditioner pipe, etc.
  • Even a hole of about 1 cm may pass through.

Don't make nests

  • Nests are built under the floor, under the ceiling, closet, drawers, etc.
    Let's keep it organized and clean.
  • Paper, cloth, binile, etc. are used as nest materials, so do not leave them alone.

Capture rats (physical extermination)

It is generally considered inefficient, but is useful in places where pesticides cannot be used.
When using equipment, be careful not to get injured.

Method by basket

  • Put it on the shadow of a mouse for more than 3 days in a row.
  • Fresh ingredients such as sweet potatoes are used for food.

Method using adhesive sheet

It will be installed in the passage for more than 3 days in a row.

Exterminate with poisonous food (chemical removal)

This is a method of mixing a rat's favorite food with a killer and feeding it to death.
There are acute venomers and cumulative venomers.
Choose the right one depending on the type of rat.

Kumalin-based insecticide

It is a drug that has a blood coagulation prevention action, and if eaten continuously for 4 to 8 days, it has a fatal effect.

Acute killer (novolomide)

It is effective to feed the lethal amount at a time.

Precautions when using drugs

  • In hot weather, rats dead in hidden places will rot and cause odors, so it is better to avoid use other than winter.
  • Clean up the food and drive it into a hungry state.
  • Place it in places where you work well or near the street.
  • If you don't eat it as a killer, mix it with the rat's favorite food to make it a dumpling or sprinkle it.
    In that case, be careful not to eat people or pets accidentally.

Confirmation of effect

After extermination, be sure to check if the effect has been obtained.
Post-processing is also important.
Let's spray insecticide on the place where the mouse was or the death.

Please feel free to contact us.

In Health and Welfare Center, we rent baskets for rats and provide consultation on extermination.
Please contact Health and Welfare Center Health Sanitation Division in your ward.
For information about rats, please refer to the leaflet "The rats need Zhu! (PDF: 2,766KB) "(updated in July 2021).

↑Return to the page of information about pests

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Inquiries to this page

Health Sanitation Division, Medical Care Bureau Health and Safety Department

Telephone: 045-671-2456

Telephone: 045-671-2456

Fax: 045-641-6074

Email address: ir-seikatsueisei@city.yokohama.lg.jp

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Page ID: 609-665-132

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