Dealing with infestations

​​​​​​​Dealing with mice infestations​

If you do have a problem with mice, using traps and bait can be an effective way to eradicate them:

  • ​For small mice infestations use a trap with bait well fixed to the loading mechanism.

  • For small mice infestations where bait is the preferred control method use a tin lid with at least a 10 mm rim to contain the bait. Top up bait until feeding stops.

  • For both the above methods locate the bait station or trap in a location that is frequented by the mice – behind the oven, ceiling space etc. Make sure it’s easy to access the bait station so that a top-up and inspection is straightforward.Mice on spot light.

Dealing with rat infestations

Using bait to eradicate rats can be more difficult as rats are highly intelligent and may not enter a bait station. However, the following methods generally work very well:

  • For ceiling and/or roof space infestations a commercial bait station can be located in the ceiling space and ‘loaded’ with a pellet bait. Rats are sometimes wary about entering a purchased bait station that has an entry portal, so if after one or two days the bait remains untouched use the below method instead.

  • ​Rats will often transport and store the bait for later consumption so it’s important to fix the bait to the bait station. Make up your own bait station by cutting a piece of wood (100mm x 50mm x 400mm). Hammer four 150mm nails 20mm into the wood equally spaced along its length. Purchase ‘ring-doughnut’ style pellet bait (eg Storm, Talon) and place the bait rings over the nails (four rings per nail is a good rule of thumb). This will stop the rats carrying the bait away. If the bait rings do not have clean holes drill the centres out.  Remember to use gloves when handling the bait. Place the bait in an area that provides the best access for topping up and inspection but locate it in an area where you think the rats are traversing. Check daily and top up until consumption stops. This may take up to five days.

​For large infestations you may need to bring in a professional contractor. For people on lifestyle blocks, where rats are entering other buildings, you may see rat burrows if the infestation is extensive and need to adopt a more sophisticated approach to eliminating the problem. This may need to be carried out over a prolonged period as the local rat population could be quite large. The following document sets out some preferred bait station designs/methods.

​Where infestations get out of control

Controlling rats and mice where quite large populations may be present, especially in well vegetated urban environments, can be challenging and you may need to contact Council to investigate the use of a professional service to eradicate, or at least significantly reduce, the local mouse and rat population. 

If you are concerned about rat and mice populations in an urban area, please contact us​.​

Page reviewed: 04 Aug 2020 12:12pm