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25.

Rent and Mortgage Interest Restrictions Acts.
During the year, 153 applications were received from
occupiers for certificates stating that premises were not
in a reasonable state, of repair. 150 were granted and 3
refused.
59 applications'were received from owners for revocation
certificates: 46 were granted arid 13 refused. V
373 visits were fri&de.by Inspectors in collection yd.th
these applications.
Rodent Control.
"The Ministry of Agriculture and Fisheries have carried "
out preliminary trials of an entirely new type of rodenticidex,
the active ingredient being an anti-coagulant chemical
- Warfarin - which, contains hydroxycoumarin., sometimes known
as Compound 42.
It is claimed; "that Warfarin is undetectable by rats and
mice and consepuently there is no poison prejudice as with a
normal poison bait. Pre–baiting is therefore unnecessary.
It is not a "one–shot" killer and must be eaten by rodents
for 3 to 10 days before its slow but inevitable action
causes death. Warfarin is used in ve??y low concentration
and is relatively safe to man and animals. There are,
hawever, limitations to its use.
Treatments with Warfarin are now being carried out by
this Department for suitable infestations, and it is hoped
that it will prove as efficacious as some of the claims
made for it.
The methods at present in use for the extermination of
rats and mice are those laid down by the Ministry of Agriculture
and Fisheries. The usual treatment includes a
pre-baiting and a poisoning period, which is repeated after