78 



SCIENTIFIC AGRICULTURE 



February, 1921. 



Abstracts of Canadian Plant Pathological Literature 



A. W. jMeCALLUM. 

 Dominion Botanical Division, Ottawa. 



The abstracts ana references given lierewith include 

 all the papers on plant diseases published in Canada 

 during 1919 and 1920. For literature which appeared 

 previous to 1919 reference must be made to the biblio- 

 graphy accumulated by Mr. W. A. McCubbiu. 



Where not otherwise stated the abstraction has been 

 done by the writer. 



Anonymous. Black or Stem Rust of Wheat. Dom. 

 Exp. Farms Bull. 33: (2nd series) 5-15. 1917.— Popidar 

 account of Puccinia graminis. 



Anonymous. The Pathological Society. Agric. Gaz. 

 Canada' 6:98. 1919.— Note concerning the organization 

 meeting of the Canadian branch of the American Phy- 

 topathological Society. ' 



Anonymous. Mosaic Disease in Potatoes. Agnc. Gaz. 

 Canada" 7:557-558. 1920. 



Anonymous. "Take All." " Flag Smut ' and Ear 

 Cockle'"' of Wheat. Agric. Gaz. Canada 6: 61a-619. 3 fig. 

 1919 There is danger of these diseases being intro- 

 duced into Canada. The first and last are well known 

 in Europe and all three are present in Australia. "Ear 

 Cockle" is now known to occur in Virginia while 

 "Take All" has been found in Illinois and Indiana. 

 "Flag Smut" also occurs in Illinois. Descriptions and 

 fontrol measures for each are given. 



Anonymous. A disease of pears, new to the con- 

 tinent of America. Agric. Gaz. Canada 6: 9;>l-9o2. 

 4 t'ig. 1919. — In September, 1919, the Division of 

 Botany, Dominion Department of Agriculture received 

 nearly mature pears from Kentville, N.S., which show- 

 ed an unusual rot. Each pear had one or more large, 

 circular, dark bro^vn spots which were (piite firm in 

 texture. Phijtopaththera cactorum was obtained m 

 culture from these spots. This disease has been knowni 

 in Europe since 1870 on varioas Cacti, maple, puic, 

 larch and fir seedUngs, apples and pears. In 191;) it 

 was found near Itaca, N.Y. 



Blair, W. Saxby. Dusting Fruit Trees for Insects 

 and Diseases. Agric. Gaz. Canaila ti : 1*1-18. 1919. 



Bridge, James II. Rusted Wheat and the Seed Situa- 

 tion for the year 1917. Man. Agric. College Circ. 28 : 1-12. 

 1916._Seed from badly rusted plants germinates but 

 seedlings are weak. Recommendations for use of such 

 seed.— G. R. Bisby. 



Brittaiii, W. H. Spraying and dusting experiments, 

 1918. Pniit Growers" Assoc. Nova Scotia Ann. Rept. 

 55 : 102-110. 1919. 



Brodrick F. W. A New Disease in Parsnips. Agric. 

 Gaz. Canada 6: 461-162. 1 fig. 1919.— A black, warty 

 growth of unkno^ra cause appears on parsnips soon 

 after they have been stored. It is thought to be the 

 same disease as that described by Cotton under the 

 name of "canker." (See Bot. Absts. 1, Entry 1612). 

 Bi \ <e, P. I. Injurious Fungi of Ste. Anne de Belle- 

 vue, 1917. Que. Soc. Prot. Plants Ann. Rept. 10: 

 49-51. 1918. Mention is made of some common fungi 

 on fruit trees and on vogp'ables. 



Bryce, P. I. Can We Imwove Potato Storage Metods? 

 Que." See. Prot. Plants Aim. Rept. 12: 53-59. PI. 8. 

 1920. 



Brief notes on the various causes of decay of potatoes 

 in storage with suggestions on storage methods. 



Cossette, J. R. Two Years of Success with Dusting. 

 Agric. Gaz. Canada 6: 168-169. 1919. 



Dickson, B. T. Report of the Delegate to the Can- 

 adian Branch of the American Phytopathological 

 Society. Que. Soc. Prot. Plants Ann. Rept. 12: 24-27. 

 1920. — Altstracts of the papers presented at the 1919 

 meeting of this society. 



Dickson. B. T. Some Plant Diseases in the Green- 

 house. Que. Soc. Prot. Plants Ann. Rept. 12: 46-48. 

 PI. 3-7. 1920. 



Drayton, F. L. The Essentials of a Dominion Plant 

 Disease Survey. Que. Soc. Prot. Plants Ann. Rept. 

 12: 31-33. 1920. 



Du Porte, E. M. Insect Carriers of Plant Diseases. 

 Que. Soc. Prot. Plants Ann. Rept. 11: 59-65. 1919.— 

 Suggests control of certain diseases by the use of in- 

 secticides rather than by fungicides. 



Eastham, J. \V. Potato Diseases. Agric. Gaz. Can- 

 ada 6: 346-348. 1919. 



Ellis. .1. 11. The Stage of Maturity of Cutting Wheat 

 when affected with Black Stem Rust. Agric. Gaz. 

 Canada 6: 971. 1919 — An experiment conducted at 

 tlie Manitoba Agricultural College indicates that when 

 wheat is attacked by rust it should not be cut green but 

 should be treated as if rust was absent. 



EUis, J. II. Observations on Rust Control. Man. 

 Extension Bull. 41 : 1-23. 1919. — Factors which hasten 

 maturity of crop or lessen rankness of growth, lessen 

 danger of rust. The results of experiments with dif- 

 ferent cultural methods are given. — G. R. Bisby. 



Field Husl)andry Staff. Flax Growing in Manitoba. 

 Man. Extension Bull. 26. 1918.— ^Mentions wilt. G. R. 

 Bisby. 



Grisdale, J. 11. Report of the Acting Dominion Bo- 

 tanist. Rept. Dom. Exp. Farias 1917-18; 38-41. 1918. 

 Grisdal,e J. II. Report of the Acting Dominion 

 Botanist. Rept. Dom. Exp. Farms 1918-19: 57-61. 1920. 

 (Jussow, II. T. Club Root in Turnips. Census and 

 Stat. Monthly 4: 21-22. 1911. 



Gussow, II. T. The Barberry and its Relation to 

 Black Rust of Grain. Census and Stat, ^lonthly 6 : 

 69-70. 1913. 



Gussow, H. T. Smut Diseases and the Threshing Ma- 

 chine. Census and Stat. Monthly 6: 189-190. 1913. 



Gussow, II. T. Tobacco Disease. Census and Stat. 

 ilonthly 6: 244-245. 1913. 



Gussow. 11. T. Canada's white pine possessions 

 threatened with extermination. Canadian Fur. Assoc. 

 Spec. Bull. 1-7. 6 fig. 1914. 



Gussow, H. T. Degeneration of Potatoes. Census and 

 Stat. Monthly 8: 306-309. 1915. — Degeneration i.e., 

 decline in the progeny due to pre-existent weakness in 

 the parent should be properly used only where sexual 

 reproduction occurs : Hence in a plant which is re])ro- 

 diiced vegetatively true degeneration cannot occur. 

 For the condition knowai as "running out" of seed the 

 term somatic deterioration as opposed to chromo- 

 somatic degeneration is proposed. The causes of this 



