ONE OF THE WORST enemies of fruit grown in 
tropical and semi tropical 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. 
