. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. DETAILED ACCOUNT OF SPECIFIC PLANT DISEASES 561 extent by chilly nights with alternating warm days. Cluster cups that originate from spores produced on the wheat plant, develop aecio- spores, which will infect only wheat plants. If it should happen that these aeciospores are blown to rye, oats, barley and rye, no infection takes place, so that the same specialization of spores form is noticeable here as with the uredospores. In America, the barberry shrubs are extremely rare and to acco
. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. DETAILED ACCOUNT OF SPECIFIC PLANT DISEASES 561 extent by chilly nights with alternating warm days. Cluster cups that originate from spores produced on the wheat plant, develop aecio- spores, which will infect only wheat plants. If it should happen that these aeciospores are blown to rye, oats, barley and rye, no infection takes place, so that the same specialization of spores form is noticeable here as with the uredospores. In America, the barberry shrubs are extremely rare and to account for the completion of the life cycle on this side of the Atlantic Ocean, 4. Fig. 204.—Germination of the chlamydospores of Tillelia falens several days after being placed on moist plaster of Paris slabs, c', showing conjugating basidio- spores. (^After Bull. 57, Univ. III. Agric. Exper. Slat., March, 1909.) recourse has been had to amphispores, which are thick-walled stalked urediniospores produced in the western states under more or less arid conditions, but Arthur thinks that the perennation of urediniospores alone is sufl&cient to explain the recurrence of the disease on the wheat plant in succeeding years. It should be emphasized also that within the species of black rust, there exist several specialized forms, more or less adopted to their own 36. 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
