THE MEDITEKKANEAN FEUIT FLY. 
15 
ORNAMENTALS SERVING AS HOSTS. 
Not only does the Mediterranean fruit fly attack the ordinary 
cultivated fruits, but in Hawaii it has shown a preference for the fruits 
of many ornamental trees and shrubs. Thus the nuts of the winged 
kamani, the ball kama- 
ni, the rose apple, dam- 
son plum, star apple, 
Brazilian plum or Span- 
ish cherry, the Surinam 
and French cherries, 
the berries of the mock 
orange and elengi tree, 
the fruits of the Natal 
plum, and the mature 
fruits of the bestill are 
all usually well infested . 
Even the fruits of cer- 
tain palms and the 
beach sandalwood may 
harbor the fly. Orna- 
mentals less subject to 
attack may be found in 
the foregoing complete 
list. 
HOST FRUITS OF COM- 
MERCIAL VALUE. 
PINEAPPLES. 
Many experiments 
have been carried on to 
determine whether the 
Mediterranean fruit fly 
can live in the pineap- 
ple. It has been found 
that even under forced 
laboratory conditions 
the fly can not live or 
mature in green or ripe pineapples. No person has ever found a 
pineapple infested by this pest in Hawaii. 
PAPAYAS. 
The papaya is one of the commonest plants about Honolulu. Its 
fruit is the universal breakfast fruit. Probably not one person in a 
thousand in Honolulu, however, knows that papayas become infested. 
Unless the fruits are allowed to remain upon the trees until overripe, 
103876°— 18— Bull. 640 3 
Fig. 12.— Bartlett pear, the pulp of which has been entirely eaten 
out by the maggots of the Mediterranean fruit fly. The fruits 
often remain on the tree and shrivel up after they have been 
ruined. (Authors' illustration.) 
