SELECTION AND MANAGEMENT 103 



It is very easy and inexpensive entirely to rid a 

 flock of ticks and as easy to prevent the attack of 

 scab. 



THE SCAB GERM. 



This is a minute form of parasitic insect too small 

 to be easily discovered with the naked eye, which 

 by burrowing in the skin, or, rather, by irritating 





DIPPING SHEEP AT THE UNIVERSITY OF WISCONSIN. 



the skin and causing it to form a crust by its own 

 exudations beneath which it burrows, greatly afflicts 

 the sheep, causing intense itching, loss of wool, loss 

 of flesh, and in the end frequently brings death from 

 the result of the distress and emaciation consequent 

 upon its disturbance. 



The scab germ multiplies with fearful rapidity, 

 each female laying in two or three days 15 eggs, 

 of which ten will hatch females and five males. 



