168 GAKDENING FOR THE SOUTH. 



potatoes must not be planted, because this will infect 

 the soil and give trouble. Stable manure secured from 

 animals fed on potatoes and beets is liable to produce 

 the disease, dotation must be practiced and clean cul- 

 ture must be the rule. 



Peach yellows ; Peach rosette. These two diseases are not 

 yet well understood. The cause is unknown, but the effects 

 have been carefully examined by pathologists, and the 

 diseases have been pronounced virulently contagious. 

 The yellows have not been located positively farther 



Fig. 65— Oosj ora scabies. Cornell Experiment Station, Bulletin 113. 



south than Virginia, but there is constant danger of its 

 introduction at any time by means of the diseased stock 

 brought from the infected districts. Peach yellows 

 manifests its presence by the premature ripening of the 

 fruit, with bright red blotches over the skin and into the 

 flesh, penetrating almost to the center of the peach, pro- 

 ducing an unnatural coloring. There is also a premature 

 unfolding of the leaf buds into pale, sickly growths, 

 giving the tree an unhealthy look. The fruit has a bitter, 

 unpleasant taste. The tree gradually succumbs to the 



