. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 25 not a gas or acid producer, gelatine liquefied. Cavities are formed around the bundles but the organism seems to be only feebly destructive to cellulose. A brown pigment is produced in the host plants and on steamed cruciferous substrata. Growth rapid on steamed potato cylinders at room temperatures, without odor or brown pigment. Growth feeble at 7°, rapid at 17 to 19°, luxuriant at 21 to 26°, very feeble at 37 to 38° and ceases at 40°. T. D. P., 10 min., 51°.. Fig. 12.—Ps. campestris. .Secti
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 25 not a gas or acid producer, gelatine liquefied. Cavities are formed around the bundles but the organism seems to be only feebly destructive to cellulose. A brown pigment is produced in the host plants and on steamed cruciferous substrata. Growth rapid on steamed potato cylinders at room temperatures, without odor or brown pigment. Growth feeble at 7°, rapid at 17 to 19°, luxuriant at 21 to 26°, very feeble at 37 to 38° and ceases at 40°. T. D. P., 10 min., 51°.. Fig. 12.—Ps. campestris. .Section of a cabbage leaf par- allel to the surface and near the margin, showing the result of infection through the water-pores. After Smith. It is closely related to Ps. hyacinthi from which it differs chiefly in its pathogenic properties, its duller yellow color and its higher thermal death point. It is troublesome upon cabbage, turnips, cauliflowers, collards; and a very large number of cruciferous hosts, both cultivated and wild are susceptible. It enters the host plant through the vascular system which becomes decidedly brown. This organism was first isolated by Pammel ^^ (see also ") from rutabagas and yellow turnips in 1892; green-house inoculations with pure cultures were made in scalpel wounds, which were then. 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 Stevens, Frank Lincoln, 1871-1934. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
