. Circular. Insects. Circular No. 101. Issued May 4, 1908. United States Department of Agriculture, BUREAU OF ENTOMOLOGY. L. O. HOWARD, Entomologist and Chief of Bureau. THE APPLE MAGGOT OK " RAILROAD ; (Rhagoletis [Trypetal pomonella Walsh.) By A. L. Quaintance, In Charge of Deciduous Fruit Insect Investigations. Five important insect pests injure the fruit of the apple in the United States, namely, the codling moth (Oarpocapsa pomonella L.), the lesser apple worm (Enarmonia prunivora Walsh), the plum cur- culio (Conotrachelus nenuphar Hbst.), the apple curculio (Antho- nomus q
. Circular. Insects. Circular No. 101. Issued May 4, 1908. United States Department of Agriculture, BUREAU OF ENTOMOLOGY. L. O. HOWARD, Entomologist and Chief of Bureau. THE APPLE MAGGOT OK " RAILROAD ; (Rhagoletis [Trypetal pomonella Walsh.) By A. L. Quaintance, In Charge of Deciduous Fruit Insect Investigations. Five important insect pests injure the fruit of the apple in the United States, namely, the codling moth (Oarpocapsa pomonella L.), the lesser apple worm (Enarmonia prunivora Walsh), the plum cur- culio (Conotrachelus nenuphar Hbst.), the apple curculio (Antho- nomus quadrigibbns Say), and the species under Fig. 1.—Apple maggot {Rhagoletis pomonella) : a, Adult; &, larva or maggot; c, funnel of cephalic spiracle; d, puparium; e, portion of apple showing injury by maggots. a, o, and d, Enlarged; c, still more enlarged; e, reduced. (Original.) The apple maggot, as the name implies, is the larva of a fly or dipterous insect, and belongs to the family Trypetidse, which group contains numerous other fruit-infesting maggots,0 some of them very serious pests, and, from their structure, mode of life, and feeding habits, very difficult of control. Apples injured or " railroaded " by the apple maggot show discolored winding burrows, or tracks, and ° Anastrepha (Trypeta) ludens Loew., the so-called Mexican orange worm, is an enemy of oranges in portions of Mexico, infesting also the guava and mango, and A. acidusa Walk, infests the peach in the same country. Rhagoletis ribicola Doane infests currants and gooseberries in the United States, as does also Epochra canadensis Loew. R. cingulata Loew has recently been found to be a cherry pest in this country, working in a way similar to the European cherry fly, Trypeta cerasi L. (signata Meig.). Ceratitis capitata Wied., the so- 36878—No. 101—08. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - co
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