28 



BULLETIN" 640/ U. S. DEPARTMENT OF AGRICULTURE. 



The great variety of host vegetation which ripens its fruit at 

 different seasons leaves no time in Hawaii when fruits are entirely, 

 out of season. The fact that certain hosts, such as the Chinese 

 orange, Surinam cherry, and mock orange, bear several crops a year 

 and others, such as specimens of the ball and the winged kamanis and 

 the bestill, appear to be seldom entirely free from ripening fruits, 

 assure food for the fruit fly the year round. The succession of fruits 

 also is increased by the individuality of trees of the same species, or 

 even of certain branches of a single tree, which results in a very 

 uneven ripening of the fruit. While the data in Table III do not 

 indicate the seasonal abundance of host fruits, they have been sum- 

 marized from the collections of clean-culture inspections during 1913 

 to show the remarkable succession of host fruits ripening in greater 

 or less abundance throughout the year in Honolulu. The presence of 

 so much ripening fruit, much of it on tall trees such as those illustrated 

 in figures 26, 27, and 28, has made it possible for the fruit fly to 

 multiply with unprecedented rapidity and thwart artificial remedial 

 measures. 



Table III. — Data indicating the seasons of the year when inspectors of the clean-culture 

 campaign collected various fruits infested by the Mediterranean fruit fly . l 



Fruit. 



Avocado 



Carambola I X 



Chinese orange X 



Chrysophyllum spp 



Coffee X 



Damson plum X 



Surinam cherry X 



Fig. 



, X 



Grapefruit X 



Guava X 



Kamani, ball 



Kumquat 



Lime 



Loquat 



Mango 



Mock orange 



Mountain apple 



Orange 



Papaya 



Peach 



Pepper 



Prickly pear 



Rose apple 



Star apple 



Bestill X 



Sour sop 



Mandarin X 



Lemon | X 



Kamani, winged X 



Spanish cherry 



Bartlett pear 



££ 





1 This table is not intended to indicate the seasonal abundance of host fruits. 



