. Diseases of small grain crops in Illinois. Grain. BOEWE: DISEASES OF SMALL CL'AIX CHOI'S 19 1935 have amounted, in total, to 53 per cent of all wheat losses attributed to disease attack. The destructiveness of leaf rust is due to its effect upon leaf tissues. Light rust attacks which occupy only small amounts. Fig. 5.—Effect of leaf rust on the leaf area of wheat plants in Illinois fields. 1926-1937. The rust attacks of different years destroy varying amounts of leaf tissue, leaving only the average leaf areas shown in the diagram to pro- duce the state's crop. of leaf tissue affect yield pr
. Diseases of small grain crops in Illinois. Grain. BOEWE: DISEASES OF SMALL CL'AIX CHOI'S 19 1935 have amounted, in total, to 53 per cent of all wheat losses attributed to disease attack. The destructiveness of leaf rust is due to its effect upon leaf tissues. Light rust attacks which occupy only small amounts. Fig. 5.—Effect of leaf rust on the leaf area of wheat plants in Illinois fields. 1926-1937. The rust attacks of different years destroy varying amounts of leaf tissue, leaving only the average leaf areas shown in the diagram to pro- duce the state's crop. of leaf tissue affect yield probably but little, but heavy attacks that seem to transform leaves completely into pustule masses destroy so much leaf tissue that good yields are impossible. Leaf rust is commonly regarded as an epidemic disease. It is, of course, present in the wheat fields of the state every year, but variations in weather, which strongly influence spore germ- ination and infection, cause noticeable differences in the annual attacks. These differences are discernible, first, with respect to the actual number of stems bearing diseased leaves and. 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: 1645px × 1518px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcolle, bookpublisherurbana, booksubjectgrain
