. Diseases of wheat, oats, barley, and rye. Grain. BOEWE: DISEASES OF WHEAT, OATS, BARLEY, AND RYE 73 occasionally the upper ones appear healthy. Diseased plants cannot be told from healthy ones before heading out; they are often overlooked at harvest because they are shorter than healthy plants and by that time have lost their black masses of spores. Life History.—The spores produced by the loose smut fun- gus on diseased heads are dispersed chiefly by the wind. Many. Fig. 23.—Loose smut of oats. Loose smut is conspicuous when oat plants are heading. Usually the spikelets of a diseased head a
. Diseases of wheat, oats, barley, and rye. Grain. BOEWE: DISEASES OF WHEAT, OATS, BARLEY, AND RYE 73 occasionally the upper ones appear healthy. Diseased plants cannot be told from healthy ones before heading out; they are often overlooked at harvest because they are shorter than healthy plants and by that time have lost their black masses of spores. Life History.—The spores produced by the loose smut fun- gus on diseased heads are dispersed chiefly by the wind. Many. Fig. 23.—Loose smut of oats. Loose smut is conspicuous when oat plants are heading. Usually the spikelets of a diseased head are entirely trans- formed into a mass of black powder, which consists of spores by which the smut fungus is spread. By harvest most of the spores have been shattered off, and a bare spike remains. of them lodge on healthy heads, either on the chaff or between the chaff and the young kernels. Some of these spores germi- nate immediately, growing into the hulls or into the seed coats of the kernels and remaining inactive there until the seed is sown the following year. Other spores do not germinate imme- diately but remain on the seed, in the grooves or between the kernels and the hulls, until the seed is sown. In any case, 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 original Boewe, Gideon Herman, 1895-. [Urbana]
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Keywords: ., bookcentury1900, bookcolle, bookpublisherurbana, booksubjectgrain
