. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 249 drops to the ground, burrows beneath the surface and spins a silken cocoon. Pupa,—Pupa within cocoon; duration one week. Hibernates. Control.—Frequent fumigation with tobacco to kill the adults. Grape Blossom Midge (Contarinia johnsoni Sling.).—A pest in the Chatauqua grape belt of New York. Adult.—A midge Iff; inch long, with yellowish body and straw colored legs. End of May. Eggs.—Minute, grey, elongate, curved; about 25 laid in ea
. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 249 drops to the ground, burrows beneath the surface and spins a silken cocoon. Pupa,—Pupa within cocoon; duration one week. Hibernates. Control.—Frequent fumigation with tobacco to kill the adults. Grape Blossom Midge (Contarinia johnsoni Sling.).—A pest in the Chatauqua grape belt of New York. Adult.—A midge Iff; inch long, with yellowish body and straw colored legs. End of May. Eggs.—Minute, grey, elongate, curved; about 25 laid in each bud which becomes swollen and yellowish and reddish when maggots begin to Fig. 157.—The wheat midKC {Diplosis Irilici): a, female fly; b, male fly; c, larva. Enlarged. {After Marlaie, U. S. Bur. lint.) Larva.—Whitish to yellow-orange; Jf 2 inch long; passes the winter in a small oval silk-lined earthen cocoon about 6 inches below surface of ground. Pupa.—¥oxm(t(\ at end of April. Control.—Spray with Black Leaf 40 just as buds of early varieties begin to open, and again a week later. Wheat Midge {Diplosis = Contarinia, tritici Kirby).—A European pest, destructive to wheat, introduced probably by way of the Province of Quebec (Fig. 157). Adult.—A minute orange-yellow fly Jf 0 inch long, smoky-tinged on the back above the wings. 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 Lochhead, William, 1864- [from old catalog]. Philadelphia, P. Blakiston's son & co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
