434 EXTERNAL PARASITES OF ANIMALS 



Disinfectant for ticks in infested stables. 



Eradication will be much facilitated if at the beginning of the work 

 all litter and manure are removed from stables, sheds, and yards that 

 have been occupied by the cattle, and deposited on land where cattle are 

 not permitted to run. After this is done, the buildings should be 

 thoroughly disinfected to destroy any eggs or ticks that may be there. 

 For this purpose the following substances may be used : 



1. A mixture made with not more than 1^ pounds of lime and 

 i pound of pure carbolic acid to each gallon of water. 



2. Any coal-tar creosote dip permitted by the United States Depart- 

 ment of Agriculture in the official dipping of sheep for scabies, 

 diluted to one-fifth of the maximum dilution specified for dipping 

 sheep. 



A spray pump should be used to apply the disinfectant, and the 

 walls, floors, and various fixtures of the buildings should be thoroughly 

 sprayed. 



Other External Parasites of Farm Animals (Crosby) 

 The insecticides. 



Following are the leading insecticidal substances used against fleas, 

 lice, ticks, and other pests of farm live-stock : 



Lime-and-sulfur dip. 



Unslaked lime 8 Ib. 



Flowers of sulfur 24 Ib. 



Water 100 gal. 



Slake the lime in a little water and add the sulfur, stirring constantly. 

 Transfer the mass to 25 gallons of hot water, and boil for two 

 hours, adding water to replace that boiled away. Let the solution 

 stand until all sediment has settled and then draw off the clear liquid 

 and dilute to 100 gallons. (U. S. Bureau of Animal Industry.) 



Nicotine solutions. There are now on the market nicotine solutions 

 with a guaranteed strength of from 5 to 40 per cent of nicotine. 

 For use they should be so diluted as to give a solution containing 

 1^ of 1 per cent of nicotine, and 16^ pounds of flowers of sulfur 

 should be added to each 100 gallons of the liquid. 



