. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Insects, Injurious and beneficial. 250 ORDER DIRT ERA studies show that this was not the true Hessian fly. If any attempts are made to control it by rotation of crops its restriction of food plants should be well known. Its life- qycle is quite similar to that of the clover-flower midge and it has become very distinctly adapted to the crop it infests. Any great change in ordinary methods of raising wheat would likely prove destructive to the insect. The winter is. Fig. 199.—The Hessian fly (Mayetiola destruc
. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Insects, Injurious and beneficial. 250 ORDER DIRT ERA studies show that this was not the true Hessian fly. If any attempts are made to control it by rotation of crops its restriction of food plants should be well known. Its life- qycle is quite similar to that of the clover-flower midge and it has become very distinctly adapted to the crop it infests. Any great change in ordinary methods of raising wheat would likely prove destructive to the insect. The winter is. Fig. 199.—The Hessian fly (Mayetiola destructor): adult female—much enlarged. (After Webster, Div. Ent., U. S. Dept. Ag.) passed in the flaxseed stage—the puparium stage. The larval skin shrinks and forms a tough, dark brown covering about the size and shape of a flaxseed. Within this there is formed a real pupa that has the outline and features of the adult insect. There is a distinct metamorphosis. These hibernating puparia give rise in early spring to adult midges that deposit eggs on the stems and leaves of wheat plants—-. 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 Osborn, Herbert, 1856-1954. Philadelphia, New York, Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1916
