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ABSTRACT MR. F. T. BROOKS'S presidential address to Section K (Botany) discusses certain aspects of recent investigations on disease in plants. With the discovery of the Mendelian

inheritance of disease resistance, a potent weapon was placed in the hands of geneticists and pathologists for the control of plant diseases. Although sometimes very successful, the breeding

of disease-resistant varieties cannot be looked upon as a panacea for the elimination of disease: great difficulties are sometimes experienced in building up these types, especially on

account of the several diseases to which most crop plants are liable and the close linkage which often exists between a valuable quality and susceptibility to a particular disease;

furthermore, progress along these lines with arborescent plants is necessarily slow. On the other hand, certain diseases can be effectively controlled either by paying due attention to

environmental conditions which favour the host at the expense of tlie parasite, by the eradication of the sources of infection in accordance with the principles of plant sanitation, or by

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Contact customer support RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Plant Pathology. _Nature_ 136, 386–387 (1935). https://doi.org/10.1038/136386a0

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