Bui. 90, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate III. 



Fig. 1.— Apple Crown-Gall on 

 Grafted Tree. 



Fig. 2.— Apple Crown-Gall on 

 Transplanted Seedling. 





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Fig. 3.— Hairy-Root Disease on 

 Grafted Apple Tree. 



Fig. 4.— Hairy-Root Disease on 

 Grafted Apple Tree. 



