. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 190 MYCOLOGY upright and divided transversely into four cells, each of which cuts off abasidiospore. These basidiospores are blown to the leaves, twigs, or fruits of the barberry where a mycelium is formed. Later pycnia (spermogonia) appear on the upper side of its leaf. These are accom- panied by round, fringed depressions, the cluster cups or aecia, which appear in the spring on the lower side of the leaves. The aeciospores are arranged in chains. These spring spores, asciospores, are
. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 190 MYCOLOGY upright and divided transversely into four cells, each of which cuts off abasidiospore. These basidiospores are blown to the leaves, twigs, or fruits of the barberry where a mycelium is formed. Later pycnia (spermogonia) appear on the upper side of its leaf. These are accom- panied by round, fringed depressions, the cluster cups or aecia, which appear in the spring on the lower side of the leaves. The aeciospores are arranged in chains. These spring spores, asciospores, are carried to the wheat plant where they induce the characteristic rusted appearance basidium teleutospore basidiospore uredospore m O uredospore. mycelium secidiospi fusion-cell Fig. 65.—Relations of various spore forms of rusts to each other. (After Grove, W. B., The British Rust Fungi, 1913, 40.) of the cereal. The wheat plant is not killed by the attack of the fungus which, however, prevents the reserve foods from being properly stored in the grains; hence, they are mushy and unfit for storage, or for bread- making purposes. It has been recently shown that in Australia and the plains of India, where the barberry is unknown, the black rust of wheat does serious danjage. Three methods are open to the wheat rust to winter over: (i) The fungus may winter by its urediniospores, (2) by a perennial mycelium, (3) by Eriksson's mycoplasm. Arthur, in Amer? ica, and others have shown that it winters by its urediniospores, 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 Harshberger, John W. (John William), 1869-1929. Philadelphia : P. Blakiston's Son & Co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1917
