Bui. 111, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate 



Fig. 1.— Upper Row, Normal Hop Cones; Lower Row, Hop Cones Injured by the 



Hop Aphis. (Original.) 



Fig. 2.— Vines in Foreground Severely Injured by the Hop Aphis Showing Lack 

 of Growth as Compared with Uninjured Vines in the Distance. (Original.) 



INJURY TO HOPS AND HOPVINES BY THE HOP APHIS. 



