Table of Contents
Volume 20, 1940

Pages ii-iv: New or Noteworthy Diseases
Pages v-x: The Weather and Its Influence on Plant Diseases
Pages xi-xiv: Maladies nouvelles ou d’ importance notable René O. Lachance
Pages xv-xvi: Recording Phenological Data R. C. Russell
Pages 1-17: Diseases of Cereal Crops
Pages 18-28: Diseases of Forage and Fibre Crops
Pages 29-62: Diseases of Vegetable and Field Crops
Pages 63-66: Viruses Isolated from Potato Varieties in Cultivation in Canada – 1940 D. J. MacLeod
Pages 67-85: Diseases of Fruit Crops
Pages 86-88: Diseases of Forest and Shade Trees
Pages 89-99: Diseases of Ornamental Plants
Pages 100-102: Additions to the Fungus Flora of the Mackenzie River Basin Margaret Newton
Pages 103-104: Index of Hosts