54 CIRCULAR 14 8, U. S, DEPARTMENT OF AGRICULTURE 



In preparing lime-sulphur dip in large quantities several hundred 

 gallons of concentrate are often made at one time in a single large 

 cooking tank. The quantity made at one boiling is limited only by the 

 facilities at hand. If the boiling tank is of sufficient capacity, a large 

 enough quantity of dip should be cooked at one time to dip the herd. 

 The quantity of mixture in the cooking tank may be varied at will, but- 

 t-he proportions of the various ingredients should not be altered. 



NICOTINE DIPS 



The nicotine dips sold under various trade names are commonly 

 used for dipping animals and spraying plants for insect pests. They 

 are efficacious remedies for horse lice and mange when diluted with 

 water so that the solution contains not less than five one-hundredths of 

 1 per cent nicotine. If used much stronger, they are liable to injure 

 horses, especially if the animals are dipped while they are warm from 

 exercise or hot weather. 



Nicotine dips are generally used warm, but should not be heated 

 above 110° F. The temperature of the bath should be maintained at 

 90° to 95°. Sulphur is sometimes added to nicotine dips in the propor- 

 tion of 16 pounds of flowers of sulphur to 100 gallons of diluted dip. 

 The addition of sulphur increases the effectiveness of the dip for 

 mange and extends the period of protection against reinfestation. 

 These dips should be diluted and used in accordance with instructions 

 printed on the label of the container. Do not use a nicotine dip the 

 strength of which is not given on the label. 



COAL-TAR CREOSOTE DIPS 



The coal-tar creosote dips, commonly known as coal-tar dips, are 

 sold under many trade names. They are made from coal-tar deriva- 

 tives, and the principal ingredient is creosote oil. which is made mis- 

 cible with water by means of soap. When diluted with soft water 

 they are efficacious in eradicating lice, but they are not dependable 

 remedies for sar Coptic mange. 



Before using a coal-tar creosote dip in hard or alkaline water, dilute 

 a small, measured quantity of the dip with the water in the proportion 

 to be used in dipping and place in a clean glass container. If. after 

 standing for one hour, an oily layer or mass of globules appears either 

 at the top or at the bottom of the liquid, the dip should not be used 

 with that kind of water, as it is liable to injure the animals. Injury 

 may occur even when there is no apparent separation in the dip so 

 tested. 



The coal-tar creosote dips may be used cold or warm, but the tem- 

 perature of the bath should not exceed 95° F. They should be diluted 

 and used in accordance with the instructions printed on the label of 

 the container. 



OIL DIPS 



Kerosene, crude petroleum, crank-case drainage from gasoline mo- 

 tors, and other oils and greases are commonly used in treating horses 

 for external parasites. When properly used they will control mange 

 and lice, but they often injure horses by blistering the skin and causing 



