Table of Contents
 Volume 21, 1941
Pages iii-vi: New or Noteworthy Diseases
 Pages vii-xii: The Weather and Its Influence on Plant Diseases
 Pages xiii-xiv: Phenological Data R. C. Russell
 Pages xv-xviii: Maladies nouvelles ou d’ importance notable René O. Lachance
 Pages 1-15: Diseases of Cereal Crops
 Pages 16-27: Diseases of Forage and Fibre Crops
 Pages 28-61: Diseases of Vegetable and Field Crops
 Pages 62-63: Potato Aphid Vectors in New Brunswick Jean Burnham Adams
 Pages 64-80: Diseases of Fruit Crops
 Pages 81-86: Diseases of Forest and Shade Trees
 Pages 87-99: Diseases of Ornamental Plants
 Pages 101-102: Index of Hosts