12 



BULLETIN 536, U. S. DEPARTMENT OF AGRICULTURE. 



Table IV. — Number and species of host trees of the Mediterranean fruit fly groiving in 

 that -portion of Honolulu covered by Table III. 



Apricot 



1 



Fig 



Avocado 



653 



Guava, common . . 



Breadfruit 



58 



Guava, strawberry 



Carambala 



48 



Java plum 



Chinese inkberry . 



6 



Kamani, ball 



Chinese orange 



148 



Kamani, winged.. 



Coffee 



298 



Kumquat 



Coffee, Li berian... 



8 



Lemon 



Cotton 



11 



Lichee 



Custard apple 



1 



Lime 



Damson plum 



4 



Loquat 



201 



94 

 73 

 80 



4 

 13 



4 

 22 

 40 

 10 

 33 



Mandarin 28 



Mango 1,154 



Mangosteen 7 



Mountain apple ... 41 



Mock orange 33 



Orange, sweet .... 372 



Papaya 687 



Peach 69 



Pear, Bartlett 2 



Pomegranate 128 



Pomelo 15 



Rose apple 



Sapodilla 



Sapota 



Soursop 



Spanish cherry . . 



Star apple 



Surinam cherry. . 



Wi 



Waiawai 



Total 4,610 



111 Hilo, island of Hawaii, host conditions are quite as favorable for 

 fruit-fly development as in Honolulu. Thus the following numbers of 

 host trees and shrubs were found in certain yards of Hilo during 

 March, 1914: 



Yard 2. 

 2 Surinam cherry. 

 2 Papaya. 



1 Thevetia. 



2 Orange. 



2 Strawberry guava. 

 14 Coffee. 

 Bananas. 



2 Avocado. 



1 Peach. 



3 Fig. 



2 Mountain apple. 



2 Lichee nut. 



3 Common guava. 



Yard 4. 

 4 Peach. 

 6 Mango. 



1 Loquat. 



3 Winged kamani. 



2 Surinam cherry. 

 1 Strawberry guava. 



Yard 1. Yard 2. Yard 3. 



1 Rose apple. 1 2 Surinam cherry. 11 Rose apple. 

 4 Surinam cherry. 2 Papaya. 2 Mango. 



2 Japanese plum 1 Thevetia. 3 Thevetia. 

 6 Mountain apple. 2 Orange. 1 Avocado. 



1 Star apple. 

 34 Coffee trees. 

 20 Common guava. 

 15 Brazilian banana, 



4 Avocado. 



3 Mango 



2 Papaya. 



5 Orange 



1 Peach. 



1 Grape. 



1 Winged kamani. 



1 Mangosteen. 



lFig. 



1 Mimusops. 



There is no time in Hawaii when fruits are entirely out of season. 

 The fact that several hosts, such as the Chinese orange {Citrus 

 japonica), Surinam cherry (Eugenia michelii), and mock orange 

 (Murray a exotica), bear several crops a year, while others, such as 

 certain specimens of ball kamani (Calophyllum inopJiyllum) (PL VI) 

 and winged kamani (Terminalia catappa) (PL XIX), appear to be sel- 

 dom entirely free from ripening fruits, assures food for the fruit fly the 

 year round. 



The succession of fruits is also 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 V do not indicate the seasonal abundance of host fruits, 

 they have been summarized from the collections of clean-culture 

 inspectors made during 1913 to show the remarkable succession of 

 host fruits found ripening in greater or less quantities throughout 



i For scientific names of fruits see section on host fruits, p. 24. 



