. Bulletin of the Department of Agriculture. Agriculture; Agriculture -- United States. •»»• '."i»* While all citrus fruits are favorite hosts of the Mediterranean fruit fly, certain of them are found to contain larvte more often than others. No citrus fruits are too acid for fruit-fly devel- opment. Larvse have been reared from the soiu-est lemons. Adult flies are fond of laying eggs in large nimibei-s in all citrus fruits. Thus 13 punctures in one gi-apefruit contained 76, 153, 32, 25, 18, 8, 46, 113, and 9 eggs, re- spectively. Thirty-nine oranges, either yellow or orange in color
. Bulletin of the Department of Agriculture. Agriculture; Agriculture -- United States. •»»• '."i»* While all citrus fruits are favorite hosts of the Mediterranean fruit fly, certain of them are found to contain larvte more often than others. No citrus fruits are too acid for fruit-fly devel- opment. Larvse have been reared from the soiu-est lemons. Adult flies are fond of laying eggs in large nimibei-s in all citrus fruits. Thus 13 punctures in one gi-apefruit contained 76, 153, 32, 25, 18, 8, 46, 113, and 9 eggs, re- spectively. Thirty-nine oranges, either yellow or orange in color, con- tained an average of 32 egg punctures, with a maximum of 108 and a minimum of 7 punctures. In 50 ripe lemons 1,422 eggs were laid in 185 punctures. Yet no adult flies developed from this gi-apefruit or from the oranges and lemons. On the other hand, well ripened Chinese oranges (fig. 18), thin-skinned limes, kimi- c[uats, and tangerines are so generally infested with larvse in the pulp before they become well ripened that they are always regarded with suspicion. Although many eggs are laid in lemons, it is rare that lemons are found with maggots in the pulp even when the fruits are so ripe. Fig. 19.—Lemons of commercial varieties have never been found with larvfe of the Mediterranean fruit fly destroying the pulp imless they have had the rind cut or broken previous to attack. The adult flies may pimcture the skin and lay eggs, as indicated by the discolored spots, but the eggs and larvse die in the peel. (Original.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , Govt. Print. Off.
Size: 1721px × 1452px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
