. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. SCHIZOMYCETES. BACTERIA 113 sweet corn have been successful. The organism is probably spread by many mechanical agencies, and also distributed clinging to the seed. The organism, morphology and reactions. The rods are short, almost ovoidal in form, ordinarily x .7-8/*. On agar the colonies are more or less circular, becoming lobulated at the margins. With age the surface is granular. The color changes from yellowish white to bright yellow. Gelatin is not liquefied. A. Fig.
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. SCHIZOMYCETES. BACTERIA 113 sweet corn have been successful. The organism is probably spread by many mechanical agencies, and also distributed clinging to the seed. The organism, morphology and reactions. The rods are short, almost ovoidal in form, ordinarily x .7-8/*. On agar the colonies are more or less circular, becoming lobulated at the margins. With age the surface is granular. The color changes from yellowish white to bright yellow. Gelatin is not liquefied. A. Fig. 27. Longitudinal Section of Stalk of Sweet Corn, showing A Diseased Bundle. (Photograph by F. C. Stewart) vigorous growth is produced on steamed potato, which in a week is iridescent. The potato turns brown in time. In bouillon a turbidity is produced, and gradually a yellowish- white precipitate is formed. Yellow, surface-colony globules appear. In Uschinsky's solution there is a vigorous growth, litmus milk is slowly decolorized, and there is no coagulation. Gas is not pro- duced, and the organism is aerobic and facultative anaerobic. Control measures. There is great difference in the susceptibility of varieties of sweet corn, and this may be made use of where necessary. Only sound seed from uninfested regions should be employed. A rotation of crops is also an important precautionary 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 Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; New York : Ginn
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