1, stealing seeds, destroying saplings and endangering forestry.

2. Digging fields, stealing grain and endangering agriculture.

3. Bite clothes and food and spread diseases.

4. Make a hole in the dam and cause a flood.

5, destruction of property: because rats often grind their teeth, they will bite various objects.

6, polluting the environment: for example, voles will destroy crops, mouse bacteria and so on.

7. Infectious diseases: 57 kinds of plague, epidemic hemorrhagic fever, leptospira, typhus and tick-borne relapsing fever.

8. Disturb people.