. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. BOOT CROPS. 43 reduce its vitality considerably. When artificial cultures were exposed to a temperature of —17* C. for one day, the organisms were completely destroyed. An of 3'3 volts (at 17° C.) destroyed B. allii when growing in sterilized pork broth (neutral). Prevention.—Onions, ivhen stored, should be kept in a. Fig. 17.— Onion Mildew (Peronospora Schleideniana). A. The fungus growing from the base of an onion leaf. B. Mycelium ramifying amongst the cells of the h
. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. BOOT CROPS. 43 reduce its vitality considerably. When artificial cultures were exposed to a temperature of —17* C. for one day, the organisms were completely destroyed. An of 3'3 volts (at 17° C.) destroyed B. allii when growing in sterilized pork broth (neutral). Prevention.—Onions, ivhen stored, should be kept in a. Fig. 17.— Onion Mildew (Peronospora Schleideniana). A. The fungus growing from the base of an onion leaf. B. Mycelium ramifying amongst the cells of the host-plant. 0. Stomata oJ leaf. D. Conidia (spores). (x 50 diameters.) perfectly dry place, or they may become a prey to this microbe.^ The Onion Mildew {Peronospora Schleideniana, I"ig. 17). This fungus is closely allied to Peronospora infestans (the potato-disease fungus), and, like all the members of the Peronosporece, grows within the leaves and stems of the host-plant. The onion mildew causes ' An electro-motive force (see any small text-boob on electricity). ^ For further information see Dr. Griffiths' papers in the Proceed- ings of the Eoyal Society of Edinburgh, vols. xv. and xvi.; and Comptes lUndus, vol. 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 Griffiths, A. B. (Arthur Bower), 1859-. London : G. Bell
Size: 1356px × 1843px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorgriffith, bookcentury1800, bookdecade1890, bookyear1890
