ONE OF THE WORST enemies of fruit grown in 

 tropical and semitropical countries is the Medi- 

 terranean fruit fly. Constant vigilance is necessary 

 to prevent its establishment in North America. It is 

 particularly destructive because it is difficult to con- 

 trol and attacks many kinds of fruits, nuts, and vege- 

 tables. In the Hawaiian Islands, where it has caused 

 great damage since 1910, it attacks 72 kinds of fruits. 

 A partial list of these contains oranges, grapefruit, 

 lemons, limes, kumquats, tangerines, peaches, apples, 

 figs, apricots, bananas, mangoes, avocados, sapotas, 

 loquats, persimmons, guavas, quinces, papayas, 

 pears, plums, grapes, eggplant, tomatoes, and even 

 cotton bolls. Most of these are now grown or can be 

 grown in our Southern States, the Gulf region, and 

 California and the Southwest. 



The purpose of this bulletin is to give alike to the 

 citizen of Hawaii, the fruit grower of the United 

 States mainland, and the traveler information that 

 will help to convey a clear conception of the difficult 

 problem that has developed with the introduction of 

 the Mediterranean fruit fly into the Hawaiian Is- 

 lands. The pest can be kept out of the rich semi- 

 tropical fruit-growing sections of the United States 

 only by the hearty and intelligent cooperation of all. 



