6 



BULLETIN 640, IT. 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 Colony, 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- 



Fig. 4.— Apples destroyed by larvae of Mediterranean fruit fly. Al- 

 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 shownin the lower fruit. (Original.) 



