Rat population soars

Posted by Big Rat on Campus on Sep 5, 2014 in Rat Answers | Subscribe

While it might not yet be a plague, the rat population has
soars thanks to a warm winter and a feast of beech mast
seeds, pest controllers say.

And the rodents are squatting in houses to keep warm and away
from the wintry weather.

Rentokil NZ regional technical manager Bill Paynter said
callouts from residential properties this year had been

Many calls had come from clients with beech trees on their
property — which provide a favourite food of the pest.

“The other thing we’ve had is a reasonably warm winter …
and when you get warm weather like that, mortality in the
nest is significantly lowered.

“You will get potentially eight baby rats coming out when
normally you’d only get two.”

In Auckland, callouts to eradicate rats from homes had
increased by 33 per pent on last year, Mr Paynter said.

“I think potentially some of the active ingredients in our
rodenticides (ccrct) have been around for quite a few years
now and we might well be getting some resistance to those.”

About every six weeks, mature rats had a litter of six to
eight babies, he said.

“And then they mature in three months — so you’ve got the
potential for quite an explosive explosion of rodents.”

Rats tended to head for warm empty roof spaces.

Houses near trees, where branches were rubbing against the
building, were in danger of rats crawling across the branch
and into the roof cavity, Mr Paynter said.

Areas that had suffered the worst infestations included
Northland, Auckland and West Coast.

Target Pest New Zealand South Island director Kurt Loklindt
said their workload would normally slow down by this time of
year, “but we’re still getting lots of callouts”.

Plants were starting to grow and flower earlier than usual,
which combined with extreme weather like flooding had
probably contributed to the increase, he said.

Department of Conservation senior services ranger for
Whangarei Nigel Miller said the best way to kill unwanted
rats was with traps and poison.

“Kill them away from your house. [Set] two or three traps
around your house, up to 100m away. Get on to them before
they get into your house.

“The bigger scale of rat control, the better.”

Getting rid of rats

* Young rats can get through holes of less than 1cm, so
ensure all holes are sealed and fit bristle strip around
* Be careful with dog or cat flaps as these can be possible
entry points for rats.
* Make sure all pipe-work is in good order, as rats can also
enter properties from the sewer through broken pipes.
* Make sure your house is clean, including under the cooker
and fridge, and all household refuse is kept in closed
* Do not put meat scraps in the compost heap, and bring in
pet food bowls after feeding.
* Poison and rat traps can be used both inside the home and
out, and can be easily purchased in hardware and DIY stores.

(Source: Department of Conservation and Rentokil)

By Rebecca Quilliam and Catherine Gaffaney of APNZ,
reporting Northern Advocate

APNZ NAD rq hm

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