. Diseases of small grain crops in Illinois. Grain. 34 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 35 leaves of normal plants. Severely affected seedlings usually remain dwarfed and tend to stool excessively. As the plants become older and begin to mature, the char- acteristic patches of dwarfed, reddish-brown plants become quite. sff jF"' 1 I fi h . See1*;* if &. \ • w Fig. 11—Helmintho- sporium disease of wheat. This disease attacks wheat plants in all stages of growth. It blights seedlings, rots roots and crowns, kills young tillers, discol- ors the bases and joints of stems, and
. Diseases of small grain crops in Illinois. Grain. 34 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 35 leaves of normal plants. Severely affected seedlings usually remain dwarfed and tend to stool excessively. As the plants become older and begin to mature, the char- acteristic patches of dwarfed, reddish-brown plants become quite. sff jF"' 1 I fi h . See1*;* if &. \ • w Fig. 11—Helmintho- sporium disease of wheat. This disease attacks wheat plants in all stages of growth. It blights seedlings, rots roots and crowns, kills young tillers, discol- ors the bases and joints of stems, and makes spots on leaves. Plants infected by it appear dwarfed as they approach matur- ity and also assume a reddish-brown tint which serves, with other symptoms, to identify the disease. Apparently resident in the soil, this disease typically attacks all plants in circular patches a few feet to several rods in diame- ter, doing most dam- age to plants in the center of the patches and injuring least the plants near the edges of the patches. (Pho- tograph by A. G. El- dredge.) noticeable. These patches vary in diameter from a few feet to several rods and are usually more or less circular. In size and color, the plants in these patches are graduated, those in the center being very much stunted and reddish brown and those at the outer edge nearly normal in size and greenness. Some- times, also, plants are attacked by Helminthosporium disease through several feet along a row, or 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 Boewe, Gideon Herman, 1895-. Urbana
Size: 1303px × 1917px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcolle, bookpublisherurbana, booksubjectgrain
