110 MANUAL OF TREE DISEASES 



from the point of attachment and often the end of the parasi- 

 tized root dies, leaving the beech-drop apparently attached to 

 the end of a root. Food material for the development of the 

 beech-drop is drawn from the beech root, and a large amount of 

 starch is formed and stored in the imdergroimd rhizome. The 

 entire plant dies dm-ing the faU and winter and apparently is 

 propagated as an annual by over-wintering seed. When de- 

 sired, the plants may be eradicated by pulling. This should be 

 done before the seeds are formed so as to prevent a crop the next 

 season. 



Reperbxce 



Schrenk, Hermann. Parasitism of Epiphegus virginiana. Amer. 

 Micros. Soc. Proc. 15:91-128, pis. 1-10. 1894. (Bibliography 

 given.) 



