208 



DISEASES OF ECONOMIC PLANTS 



tive to sugar beets in Germany. It has been reported from 

 several places in the United States. 



Air-slaked lime, 60 to 70 bushels per acre, has been 

 recommended. 



Scab (Oospora scabies Thaxt.). — This scab resembles 

 closely the scab of the Irish potato and is caused by the 

 same fungus.' It usually covers more completely the sur- 



FiG. 94. — Potato scab on beets. 



face of the beet than in the case of the potato, and tends 

 more to form corky growths upon the surface than to make 

 deep cavities. Usually the corky growth takes a brown color 

 which frequently penetrates to some depth into the beet. 



Beets should not be grown upon land known to be in- 

 fected with the potato scab or to have borne a badly in- 

 fected crop of beets. See also potato scab. 



Soft rot, bacteriose (Bacterium teutlium Met.). — Soft 

 rot described by Metcalfe in 1904 is prevalent in Nebraska 

 and in many other states where beets are grown. 



' Bolley, H. L., N. Dak. Agr. Exp. Sta. Bui. 4, December, 1891. 

 2 Metcalf, H., Neb. Agr. Exp. Sta. Rpt. 17, p. 69, 1904. 



