Bui. 536, U. S. Dept. of Agriculture. 



Plate XI 



Hosts of the Mediterranean Fruit Fly. 



Fig. 1. — The Mediterranean fruit fly attacks cotton bolls about the 

 time they are nearly full grown. This attack, however, appears 

 to be of a secondary nature and follows that of the pink bollworm 

 (Pectinophora gossipiella). As many as 10 well-grown larvae have 

 been removed from a single boll. Fig. 2. — Cross section of an apple 

 (Pyrus mains) showing the destruction caused by feeding larvae 

 of the Mediterranean fruit fly. (Original.) 



