. Science of plant life, a high school botany treating of the plant and its relation to the environment. Botany. 264 Science of Plant Life kind of spore is formed. This spore will not germinate on the barberry, but it will infect wheat. Thus the stem rust. Fig. 155. Lite history of the stem rust of wheat. In fields where wheat has been grown, the stubble (A) carries over the winter black spores {B), that germinate in early spring, producing smaller spores (C). These infect the leaves of the common bar- berry (D), In the leaves of the barberry the fungus grows and produces cup-shaped cavities f
. Science of plant life, a high school botany treating of the plant and its relation to the environment. Botany. 264 Science of Plant Life kind of spore is formed. This spore will not germinate on the barberry, but it will infect wheat. Thus the stem rust. Fig. 155. Lite history of the stem rust of wheat. In fields where wheat has been grown, the stubble (A) carries over the winter black spores {B), that germinate in early spring, producing smaller spores (C). These infect the leaves of the common bar- berry (D), In the leaves of the barberry the fungus grows and produces cup-shaped cavities filled with spores (E) that are carried by the wind to wheatfields and infect the wheat plants. After growing in the wheat a short time, the fungus produces first the red spores (G) that spread the disease to other wheat plants, and later the two-celled black spores that carry the disease over the winter again. of wheat spreads from one wheat plant to another by means of red spores, from wheat to the barberry by spores that are produced the next spring, and from the barberry back to the wheat by still another kind of spore. In the Northern states, from the Dakotas to New England, the barberry stage is of special importance in the life history of the rust. In the central United States where winter wheat is grown, the red spores produced during the summer drop to the ground and infect the wheat planted in the au- tumn. In this way the rust may be perpetuated from year. 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 Transeau, Edgar Nelson, 1875-1960. Yonkers-on-Hudson, N. Y. , World Book Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1921
