. Elementary principles of agriculture : a text book for the common schools. Agriculture. Some Special Injurious Insects 169. at night; usually in the afternoons. In wet weather the corn may be protected by a line of tar or crude oil. Chinch bugs pass the winter in tufts of grass (Fig. 105). 236. The Hessian Fly is a native of Europe and is supposed to hiive been introduced into America by the Hessian soldiers in the Revolutionary War; hence the name. Next to the chinch bug it is the most serious in- sect pest of the wheat crop. It has been found that the damage can be largely prevented by plo
. Elementary principles of agriculture : a text book for the common schools. Agriculture. Some Special Injurious Insects 169. at night; usually in the afternoons. In wet weather the corn may be protected by a line of tar or crude oil. Chinch bugs pass the winter in tufts of grass (Fig. 105). 236. The Hessian Fly is a native of Europe and is supposed to hiive been introduced into America by the Hessian soldiers in the Revolutionary War; hence the name. Next to the chinch bug it is the most serious in- sect pest of the wheat crop. It has been found that the damage can be largely prevented by plowing under the stubble j ust after har- vest and destroying the volunteer wheat in summer. The stubble harbors the pupal stage. [^[226.] If turned under deeply it prevents many of the flies from escaping, and thus reduces the late "summer crop" of flies and maggots. The adult Hessian fly may be seen in infested fields in late summer or early spring. It is a yellowish brown colored, long-legged, gnat-like insect (Fig. 106). The female lays slender, oval, reddish eggs, lengthwise the grooves on the upper side of the leaves. These eggs, just large enough to be seen with the unaided eye, hatch out tiny reddish larvae that wriggle down to the stem under the leaf sheath where they feed and grow. The maggots soon lose their reddish color, turn white, form a fiaxseed- like broAvn pupa before cold weather. Some of the pupae hatch out, producing the "spring crop" of flies. Most of the pupae, however, remain dormant on the stubble and develop the late "summer brood" of flies, which in turn Fig. 106. Hessian fly. a, adult, about three times natural size; b, pupa or "flaxseed" stage, slightly enlarged; c, larvae or maggots, enlarged. After 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
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
