. College botany; structure, physiology and economics of plants. Botany. 250 COLLEGE BOTANY tion as worked out by Darwin, Mendel, DeVries and other more recent students of the subject. Bacteriology dates from the work of the great French scien- tist, Pasteur (Fig. 115). It involves the study of the very minute organisms, which are probably the lowest of the fungi. Some of these organisms are extrpmely important factors in soil fertility and therefore it is very closely associated with agri- cultvire; other organisms are the cause of diseases of man and beast and therefore it is closely associa
. College botany; structure, physiology and economics of plants. Botany. 250 COLLEGE BOTANY tion as worked out by Darwin, Mendel, DeVries and other more recent students of the subject. Bacteriology dates from the work of the great French scien- tist, Pasteur (Fig. 115). It involves the study of the very minute organisms, which are probably the lowest of the fungi. Some of these organisms are extrpmely important factors in soil fertility and therefore it is very closely associated with agri- cultvire; other organisms are the cause of diseases of man and beast and therefore it is closely associated with the study and practice of medicine; other organisms are the cause of diseases of plants and there- fore it is closely associated with the study of plant pathology; while still others are of impo'rtance in the .manufactur- ing industries. Plant p'oihology deals with the causes and treatments of plant diseases. For many years it was studied .by two entirely different groups of workers, the mycologist, who was interested primarily in the causal organism, and by the grower, who was interested in the protec- tion of his crops. Little progress was made under these conditions, but finally the subject was taken up in a more comprehensive manner by the botanists and is now recognized as one of the most important branches of botany. It involves a careful study of the organisms causing the diseases, their effect on the host plant and the methods of eradication or control. The object of plant pathol- ogy is primarily the increase of plant production by the protection of valuable plants from their enemies. It Is very closely corre^ lated with plant physiology, agronomy, horticulture and Fig. 115.— 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 Cook, Melville Thurston, 1869-1952. Philadelph
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1920
