. Diseases of economic plants. Plant diseases. Vegetable and Field Crops 167 resulting in complete loss. The bacteria may travel upon seed from diseased localities, infect the young plants, and initiate an attack in a new locality. Plants shipped across the country may also carry infection. The disease may be carried from field to field in any plant part or in infected soil, upon tools, feet, etc., and espe- cially in manure that has become infected by the use of. Fig. 90. — Cauliflower affected with black-rot. Original. diseased plants as feed. To avoid carrying contamination to near-by field
. Diseases of economic plants. Plant diseases. Vegetable and Field Crops 167 resulting in complete loss. The bacteria may travel upon seed from diseased localities, infect the young plants, and initiate an attack in a new locality. Plants shipped across the country may also carry infection. The disease may be carried from field to field in any plant part or in infected soil, upon tools, feet, etc., and espe- cially in manure that has become infected by the use of. Fig. 90. — Cauliflower affected with black-rot. Original. diseased plants as feed. To avoid carrying contamination to near-by fields all the precautions suggested under soil diseases must be employed. With infested land the only recourse is such crop rotation as will avoid the planting of a susceptible crop for a period of several years. Just how long the bacteria can remain alive in the soil is not known. In practicing crop rotation for elimination of this pest all cruciferous weeds, mustard, shep- herd's purse, etc., should be avoided, since they are sus-. 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- [from old catalog]; Hall, John Galentine, 1870- [from old catalog] joint author. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1921
