THE RELATIONS OF ARACHNIDS TO MAN 



123 



F/ELD A/0. 2 



CORN, 



COWPEAS. 



WHEN FEED BECOMES 



SHORT MOVE THE HERD 



FROM THIS F/ELD TO 



F/ELD No. 3 



F/ELD No. 3 



COTTON 

 FOLLOWED BY 

 CR/MSON CLOVER, VETCH, 

 BUR CLOVER OR RYE. 



FEBR. /S, 



MOVE THE HERD TO 

 Ft ELD No, 4 



F/ELD A/o. 4 



OATS, 



COWPEAS, 

 BERMUDA, 

 BUR CLOVER. 



BECOMES THE NEW 

 PASTURE. 



HOUSE 



A/o. / 



PASTURE. 



OCr. /5, MOVE HERD TO FIELD No. 

 PLANT /N OATS AND FOLLOW W/TH COWPEAS. 



FIG. 68. Plan which will eradicate the Texas- fever tick from pastures. (After 



Graybill.) 



against the grass blades or weeds to which the young ticks are 

 clinging, the ticks fasten themselves to the bodies of the animals 

 and begin to suck their blood. During this process parasites 

 from the tick's body are transferred to the blood of the cattle. 



