. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 13° FUNGOUS DISEASES OF PLANTS are the seat of action, and later the pitted vessels are infested. In late stages of the disease the lesions may be considerable, the bundle system being broken down and cavities formed in the ad- jacent tissues. The lesions are also very noticeable when the organism has gained entrance to the fruit. The organism is a rod averaging two or three times as long as broad, X >5--7> often adhering in twos, and rapidly motile only when young (F
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 13° FUNGOUS DISEASES OF PLANTS are the seat of action, and later the pitted vessels are infested. In late stages of the disease the lesions may be considerable, the bundle system being broken down and cavities formed in the ad- jacent tissues. The lesions are also very noticeable when the organism has gained entrance to the fruit. The organism is a rod averaging two or three times as long as broad, X >5--7> often adhering in twos, and rapidly motile only when young (Fig. 37). The rods are readily stained. Fig. 36. Bacterial Wilt of Melons. (Photograph by H. H. Whetzel) with carbol fuchsin, but the flagella are not so readily demon- strated. Growth in bouillon results in a turbidity, and in potato decoction viscosity is developed with age. Coagulation of milk does not occur, and after weeks no viscosity is evident. On gelatin growth is slow, and there is no liquefaction. Similarly, on agar the clear, or milk-white, colonies spread slowly. Stab cultures develop a slight growth throughout the extent of the stab, with lobulated projections. On slices of potato there is a. 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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Keywords: ., bookauthorduggarbe, bookcentury1900, bookdecade1900, bookyear1909
