. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 46 BULLETIN 536, U. S. DEPABTMENT OF AGEICTJLTUBE. That it may be appreciated that, contrary to the belief of many, the wild guavas in the mountains back of Honolulu are a continual source of adult flies, particularly in midwinter, the following records were made: 21 fruits picked on and near the top of Round Top, Tantalus, 1,100 feet eleva- tion, December 19, 1913, yielded 63 adults. 24 fruits from Pauoa Flats, 1,100 feet elevation, December 22, 1913, yielded 69 adults. 42 fruits from rim of Palolo Crater during Decem
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 46 BULLETIN 536, U. S. DEPABTMENT OF AGEICTJLTUBE. That it may be appreciated that, contrary to the belief of many, the wild guavas in the mountains back of Honolulu are a continual source of adult flies, particularly in midwinter, the following records were made: 21 fruits picked on and near the top of Round Top, Tantalus, 1,100 feet eleva- tion, December 19, 1913, yielded 63 adults. 24 fruits from Pauoa Flats, 1,100 feet elevation, December 22, 1913, yielded 69 adults. 42 fruits from rim of Palolo Crater during December, 1913, yielded 362 adults. 22 fruits from top of east ridge, Manoa Valley, 1,000 feet elevation, yielded 100 adults. 50 fruits from head of Palolo Valley, 1,000 feet elevation, on January 2, 1914, yielded 84 adults. 59. Peach (Pruniis persica). The peach {Prunus persica) is the most preferred of all host fruits grown in Hawaii and in other countries (fig. 3). While excellent peaches have been grown in the islands, at the present time scarcely a peach matures on the lower levels, and usually the fruits are utterly destroyed before they are more than half to three-fourths grown. From 128 fruitB, about three-fourths grown, picked from the ground during April, 1913, 2,929 adults, or an average of about 23 adults per fruit, were reared. From 10 of these fruits 34, 12, 25, 8, 49, 78, 64, 17, 6, and 54 adults, respectively, were reared. As many as 90 larvae have been taken from a single fruit. The writers have on file data secured during experimental work on the infesta- tions of several thousand individual fruits, but they throw no additional light on the severity of peach infestation. 60-62. Nectarine (Prunus persica var. nectarina), Apricot (Prunus armeni- aca), and Plum (Prunus spp.).. Fig. 3.—Cross section of peach, showing the gen- eral shriveling of the walls of the egg cavity and the separation of the eggs. Drawing made 1J days after opposition. (Authors' illustration.)
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