6 
BULLETIN 640, U. S. DEPARTMENT OF AGRICULTURE. 
exported from Hawaii, offer so little danger as carriers of the Med- 
iterranean fruit fly, when they are packed for shipment, that this 
part of Hawaii's export trade in fresh fruits with the coast may still 
be carried on, provided the inspections of the Federal Horticultural 
Board now in force 
are continued. The 
necessary quaran- 
tines against all other 
host fruits, however, 
particularly against 
such fruits as the avo- 
cado and mango, has 
had, and will continue 
to have, a serious ef- 
fect upon horticul- 
tural pursuits and the 
development of the 
small farmer. 
At present the in- 
festation of edible 
fruits in the coastal 
regions of Hawaii is 
general and about as 
severe as could be ex- 
pected. The work of 
the Mediterranean 
fruit fly, with that of 
the melon fly, has put 
a most serious check 
upon the horticul- 
tural development of 
the islands just at a 
time when this devel- 
opment was gather- 
ing strength. In 
South Africa the 
Mediterranean fruit 
fly is regarded as one 
of the greatest draw- 
backs to the develop- 
ment of the fruit in- 
dustry in Cape Coloii3 T , where, it is stated, during certain favorable sea- 
sons large areas of apricots, figs, pears, plums, apples (fig. 4), and 
quinces are almost all affected. Many instances of damage to citrus 
and other crops in southern Europe, South America, Africa, and Aus- 
Apples destroyed by larvae of Mediterranean fruit fly. 
though an apple externally may appear normal aside from the dark 
spots where the female fly punctured the skin in laying her eggs, the 
pulp is often found badly decayed and eaten out by the maggots, 
as shown in the lower fruit. (Original. ) 
