THE MEDITERRANEAN FRUIT 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, ths 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.) 



