THE POTATO SCAB 



169 



Professor II. L. Bolley has shown that what is probably 

 this same disease occurs also on beets planted on j^otato 

 ground. 



Treatment. — Dr. Roland Thaxter, after seyeral 

 years of careful study, summarizes the preyentive meas- 

 ures to be taken against this disease as follows : (1) The 



FIG. 74. POTATO INJURED BY SCAB. 



seed must be free from any scabs. (2) Land wliicli has 

 produced scabbed cro]3s in previous years, either of pota- 

 toes or of beets, or has been fertilized with manure from 

 scab-fed stock, must not be planted to potatoes. (3) 

 Scab potatoes should neyer be fed to stock, under any 



