How many days does it take to kill rats in the property?

Upon inquiry, the Regulations on Disinfection Work shows that:

1. Public corridors, fire stairs, underground parking lots, septic tanks, rain wells, green belts, cable trenches, garbage rooms, computer rooms and other public * * * parts required by users.

2. The time for killing insects and rodents is not less than twice a month, and the first week and the third week of each month are the time for killing rodents. Once insects and rats are found, they should be sprayed immediately. So the release time is one week.