. Control of rats and mice. Rats; Mice. ANTU. Fig. 14.—Poison station lor house mice (using drinking fount for baby chicks). Poisoned grain or seeds in the inverted jar fiow into the open-topped metal base, where mice can feed. The jar should be labelled POISON. This device should be used only in an attic or store- room securely locked to prevent entry by chil- dren, unauthorized persons, or animal pets, and where the odor of dead mice will not be objectionable. Bait Zinc phosphide, powdered Formula 2 96 to 100 parts by weight 1 part by weight Corn oil, mineral oil, or glycerin, at 12 to 24 fl
. Control of rats and mice. Rats; Mice. ANTU. Fig. 14.—Poison station lor house mice (using drinking fount for baby chicks). Poisoned grain or seeds in the inverted jar fiow into the open-topped metal base, where mice can feed. The jar should be labelled POISON. This device should be used only in an attic or store- room securely locked to prevent entry by chil- dren, unauthorized persons, or animal pets, and where the odor of dead mice will not be objectionable. Bait Zinc phosphide, powdered Formula 2 96 to 100 parts by weight 1 part by weight Corn oil, mineral oil, or glycerin, at 12 to 24 fluid ounces per 100 pounds of bait, is often added to any dry cereal to make the poison adhere. The bait and poison are first mixed dry until the zinc phos- phide becomes an evenly distributed coat- ing. Then the oil, well warmed, is added slowly and the mixture is stirred again. Baits may be cereal or bread crumbs alone or may include some fresh fish, horse meat, or hamburger. Ground apple or carrot are sometimes used. Stale bread, without an oil, but mixed with an equal amount of water, has been used with 2% to 5 per cent zinc phosphide in England. This new poison (alphanaphthyl- thiourea), has proved useful for control of Norway rats. It is much less toxic for black or roof rats, house mice, or field rodents, and other poisons should be used for those animals. ANTU will not seri- ously poison poultry and man, but may kill cats, dogs, and pigs, and should be handled carefully (Richter, 1945; Ward, 1946). ANTU is a fine bluish-gray powder, insoluble in water, that keeps well when stored dry. It may be mixed with wet or dry foods, and adheres well when dusted from a sifter on cut moist baits of apple, sweet potato, cantaloupe, watermelon, or on ground meat, ground fish, or chicken heads. Formula 3 Bait ANTU 100 parts by weight 2 or 3 parts by weight Arsenic This heavy white powder (also known as arsenic trioxide, arsenious acid) has often been used for rat control. It is now l
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