§ Mr. Hoosonasked the Minister of Agriculture, Fisheries and Food if he will now take steps to ensure that local authorities in areas threatened by the presence of warfarin resistant rats are given special grants to enable intensive campaigns to be mounted against this menace, and, in view of the increase in the number of such rats, if he will reconsider his policy in this matter announced in December, 1966.
§ Mr. Hoosonasked the Minister of Agriculture, Fisheries and Food what other forms of poison have been tried for killing off warfarin resistant rats; and whether rats have developed immunity to these particular poisons.
§ Mr. HoyCoumatetralyl, norbomide and zinc phosphide. In some cases resistance to coumatetralyl has developed.
§ Mr. Hoosonasked the Minister of Agriculture, Fisheries and Food what is the extent of the area in Mid-Wales and the Welsh borders in which warfarin resistant rats are now found; and by how much the area has increased in the past two years.
§ Mr. HoyThe area is approximately 400 square miles and has not increased in the past two years, although a few cases of resistance have been or are being dealt with just outside it.