CONTENTS 



Pages 



List of members.. 5 



Financial statem,ent.— _ 8 



Business meeting ,.. _. 9 



Address of Welcom.e, Principal Harrison, D.Sc... 10 



The Story of Spraying Mixtures, Prof. AVm. Lochhead 12 



Report of Delegate to the Canadian Branch of the Am.erican Phytopathological 



society. Prof. B. T. Dickson : 20 



The present Status of Plant Pathology in Agriculture, Prof. H. H. "NMietzel.. 24 



Our Winged Allies, Dr. W. T. MacClement 31 



The Larch Aphis, Dr. J. C. Chapais 39 



Chemical Investigation of Sprays, A. Kelsall 41 



The Potato Plant Louse, Om.er Caron 45 



Some Methods of Seed Treatment, George Maheux 47 



The Discovery of the European Corn Borer in Southern Ontario, L. S. McLaine 51 



Germ.ination of Teliospores of Puccinia Antirrhini, J. F. Hockey 54 



Methods of Prolonging the Durability of Fence Posts, J. A. Roy... 57 



Plant Diseases of 1920-21, Prof. B. T. Dickson 66 



Sprajdng vs Dusting, C. E. Fetch : 68 



The Immunization of Plants, Dr. G. P. McRostie 73 



