. Circular. Insect pests; Insect pests. wheat are infested, the last, according to Prof. F. M. Webster, often being quite seriously injured by the aphides in the fall, the yourg plants being attacked at or just below the Fig. 2.—The European grain aphis {Siphocoryne avcmv), a common aphis on apple: o, migratory female; b, sexual female; c, antenna of migratory female; d, side view of end of body of winged male; c, under side of end of body of male; /, under side of end of body of sexual female. All greatly enlarged (from Pergande). NATURAL HISTORY AND HABITS. This species has been wel
. Circular. Insect pests; Insect pests. wheat are infested, the last, according to Prof. F. M. Webster, often being quite seriously injured by the aphides in the fall, the yourg plants being attacked at or just below the Fig. 2.—The European grain aphis {Siphocoryne avcmv), a common aphis on apple: o, migratory female; b, sexual female; c, antenna of migratory female; d, side view of end of body of winged male; c, under side of end of body of male; /, under side of end of body of sexual female. All greatly enlarged (from Pergande). NATURAL HISTORY AND HABITS. This species has been well treated by Sanderson and Pergande, and has been found to present a very interesting life history. The shiny, jet-black winter eggs are deposited by the females in the fall around the buds of the more terminal shoots, at crotches of limbs, and in cracks []. 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. Bureau of Entomology. Washington, D. C. : The Bureau
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1904
