114 PROTECTION OF PLANTS, 1921-22 



McCallum, a. 'W .—Abstracts of Canadian Plant Pathological Literature. Sci. Agric. 1: 

 78-80. 1921.— Abstracts of papers on plant pathology published in Canada during 1919 and 1920. 



McCready. S. B. — Fungi and Plant Pathology. 36th Ann. Rept. Ont. Agric. Coll. and Exp. 

 Farm for 1910: 37-47. 6 fig. 1911. 



McCuBBiN, W. A. — White pine blister rust on currants. Can. Hort. 40: 34. 1 fig. 1917. 



McRosTiE, G. v.— The Immunization of Plants. Sci. Agric. 1: 122-124. 1921.— Advocates 

 the production of resistant varieties as the logical means of combatting plant diseases. 



MiDDLETON. IM. S.— Plant diseases. 12th Ann. Rept. B. C. Dept. Agric. for 1917: 20-21. 1918. 



Mitchell, W. G. — Treated Wood Block Paving. Canada, Dept. of Interior, Forestry 

 Branch Bull. 49: 1-40. 20 fig. 1915. 



Mitchell, W. G. — The Preservative Treatment of Timber. Canada Lumberman and Wood- 

 worker. June 15: 34. 1916. 



Murphy, P. A. — The black leg disease of potatoes caused by Bacillus solanisaprus. Dom. 

 Exp. Farms Bot. Circ. 11 : 1-8. Fig. 1-6. 1916. — A brief description of the symptoms and injuries 

 due to black leg together with the life historj' and control of the causal organism. 



MupPHY, P. A.—Late blight and rot of potatoes caused by the fungus Phytophthora infestans. 

 Dom. Exp. Farms Bot. Circ. 10: 1-13. Fig. 1-2. 1916.^Life history of the fungus with symp- 

 toms and control of the disease caused by it. 



Murphy, P. A. — Potato Spraying in Prince Edward Island. Ann. Rept. Dept. Agric. 

 P. E. I. 98-103. 1 pi, 1917. 



Murphy, P. A. — Some constitutional diseases of the potato. Can. Hort. 42: 9. 1919. 



Murfhy, p. a. — Investigation of Potato Diseases. Canada, Dept. of Agric. Dom. Exp. 

 Farms Bull. 44 (2nd series.) 1-86. Fig. 1-34. 1921.— This bulletin embodies the results of the 

 author's extensive investigations on potato diseases. The following diseases are treated very 

 fully — ^late blight, black leg, leaf roll , mosaic, curly dwarf and related troubles. A comprehensive 

 bibliography is appended. 



Newton, Margaret A. — A Preliminary Report on the Occurrence of Biologic Forttis of Wheat 

 Stem Rust in Western Canada. Sci. Agric. 1: 213. 1921.— Until 1916 only one biologic form of 

 stem rust was known to occur on wheat. To date eleven strains have been isolated in Canada. 

 Among these there are no new forms, all of them having been described by Stalonan. Breeding 

 resistant varieties seems to be the most promising method of controlling rust but before this can 

 be done effectively more must be known of the number, characteristics and distribution of the 

 biologic forms in Canada. 



Panton, J. H. — Plant Diseases. 20th Ann. Rept. Ont. Agi-ic. Coll. and Exp. Farm for 1894: 

 7, 8. 13. 17. 18. 9 fig. 1895. 



Panton, J. K.—Itislructionsfor spraying. Rept. Dept. Agric. N. B. 209-222. 13 fig. 1897. 



Fetch, C. E.— Spraying vs Dusting. Sci. Agric. 1: 171-172. 1921.— The writer has found 

 dusting to be as efficient as spraying in the control of apple scab and biting insects though not in 

 the control of sucking insects. It is more easily applied and is as cheap. 



Robertson, R. — Experiments to prevent smut in oats and barley. Dom. Exp. Farms Rept. 

 283-285. 1900. 



Roy. J. A.— Methods of Prolonging the Durability of Fence Posts. 13th Ann. Rept. Que. 

 Soc. Prot. Plants for 1920-1921: 57-65. 1921.— Describes a number of different treatments and 

 gives the approximate cost of each. 



Sandbrs. G. E. and A. Kelsall. — Dusts and Dusting for Insect and Fungus Control. Part I. 

 The Present Status of Dusting. Sci. Agric. 1: 14-18. 1921.— A discussion of the relative merits 



