00000nam 2200000za 4500 9.828532 CaOODSP 20250303104653 cr ||||||||||| 161202s1932 oncaobd#o f000 0 eng d CaOODSP eng n-cn--- x1x3 A12-2/160-1932E-PDF Newton, Margaret. Specialization and hybridization of wheat stem rust, Puccinia graminis tritici, in Canada [electronic resource] / by Margaret Newton and Thorvaldur Johnson. At head of title: Studies in cereal diseases VIII Ottawa : Division of Botany, Dominion Experimental Farms : Department of Agriculture, 1932. 60 p. : ill. Bulletin, New series ; no. 160 Title from cover. Historical publication digitized by the Internet Archive in 2013 [on behalf of Agriculture and Agri-Food Canada]. Includes bibliographical references. "Annual rust surveys have been made in Canada for the past twelve years to determine the prevalence of physiologic forms of Puccinia graminis tritici, but the information gathered in this period has never been brought together in published form. ... One of the objects which the writers had in view when this bulletin was undertaken was to give a comprehensive account of the results of the stem-rust surveys carried out during the period 1919 to 1930. It was also thought worth while to discuss in some detail the methods used and the technique involved in the determination of physiologic forms"--Introd., p. [3]. gccst Cereals gccst Plant diseases Johnson, Thorvaldur. Canada. Department of Agriculture. Canada. Division of Botany. Bulletin (Canada. Department of Agriculture) no. 160 (CaOODSP)9.812039 PDF 5.43 MB https://publications.gc.ca/collections/collection_2016/aac-aafc/agrhist/A12-2-160-1932-eng.pdf