mulatioii of body lluids within the 

 chest cavity, literally drowning 

 the animals. 



Dogs and other pets, pigs, and 

 day-old chickens are easily killed 

 by ANTU. Although many other 

 domestic animals are more resist- 

 ant to this poison, all precautions 

 should be taken to prevent chil- 

 dren, pets, domestic animals, or 

 foodstuffs from coming in contact 

 with it. 



Most effective results are ob- 

 tained when ANTU is used in food 

 baits in a concentration of ly^ 

 percent. It is essential that a 

 complete coverage be made when 

 baiting with this poison. Rats 

 receiving less than a lethal dose 

 build up a tolerance as well as a 

 strong dislike for the material. 

 Operations with ANTU should 

 not be conducted at intervals of 

 less than 4 to 6 weeks. Hence, in 

 a permanent control program in 

 which ANTU is used, it should 

 be alternated with some other ef- 

 fective rodenticide. 



Zinc Phosphide 



Zinc phosphide is highly toxic 

 to all forms of animal life, and 

 great care must be exercised in its 

 use. It is a dark gray powder, 

 insoluble in water, and has a 

 strong pungent odor character- 

 istic of phosphorous compounds. 

 Although this poison is well ac- 

 cepted by rats, the odor is, to some 

 extent, unattractive to some ani- 

 mals. Zinc phosphide deterio- 

 rates rather rapidly, hence baits 

 treated with it are relatively non- 

 toxic after being exposed several 

 days to the open air. For longer- 

 lasting effects, the baits should be 

 wrapped in waxed paper. As 

 fats and oils increase the absorp- 

 tion of phosphorus in the body, 

 baits composed of these materials 

 give the best results. A small 

 quantity of bacon fat or mineral 

 oil added to the bait mixture will 

 usually prove satisfactory, as well 



as make it easier to blond the mix- 

 ture. A 1-percent concentration 

 of zinc phosphide should be used 

 in the baits. 



A number of deaths among hu- 

 man beings have occurred from 

 misuse of phosphorous poisons. 

 In view of the hazards involved, 

 the use of other types of phos- 

 phorous compounds and mixtures 

 of the pure element is not encour- 

 aged. 



POISONS FOR SPECIAL USE 



Poisons consisting of highly 

 toxic substances that are ex- 

 tremely dangerous to all forms of 

 animal life should be used only by 

 trained professional operators. 



Sodium Fiuoroacetate or 

 Compound Ten-Eishty 



Sodium fiuoroacetate or com- 

 pound ten-eighty is not sold on the 

 open market. Its use is restricted 

 to insured pest-control operators 

 and to qualified Government tech- 

 nicians. There is no antidote for 

 this poison. It is so toxic that 

 merely one-half ounce is mixed in 

 a gallon of water to make a drink- 

 ing bait, and a single sip of this 

 preparation will kill a rat. Fur- 

 thermore, the poison does not dis- 

 integrate upon being swallowed. 

 A cat or a dog that eats dead or 

 dying rats that have received this 

 poison will also be killed. Be- 

 cause of this danger of secondary 

 poisoning, compound ten-eighty 

 should not be exposed indiscrimi- 

 nately out-of-doors or in places 

 where pets or domestic animals 

 are kept. Use of this material, 

 except by trained individuals, is 

 not recommended. 



Thallium Sulphate 



Thallium sulphate is another 

 deadly substance not recommend- 

 ed for general use. Although not 

 so toxic as compound ten-eighty, 

 it is tasteless and is readily ac- 



