76 PROTECTION OF PLANTS, 1918-19 



following, warning against potato canker; corky scab; rhizoctonia. Other diseases dealt with are 

 rot of turnips due to Phoma napobrassicae Rost., club root of crucifers; bitter pit of apples; shot 

 hole of cherries; point rot of tomatoes; raspberry cane blight; blight of ginseng {Alleniaria panax, 

 Whetzel); leaf spot of iris {Heterosporium gracile Sacc) ; and leaf spot of rose {Actinonema rosea 

 Lib. Fr.). 



Gussow, H. T., Potato Cayiker Imported into Canada. Central Expt. Farm, Farmers' Cir. 

 No. 1, 1912. Calls attention to this disease, notes its characteis and destructive nature and warns 

 against importation of European potatoes. 



Gussow, H. T., Rept. of Dom. Botanist, Central Expt. Farm Rept. 1911: 237-260 4 pi., 

 Rust, smut, and a mildew of wheat; frosted wheat; bacteria interfering with malting; apple diseases; 

 frost belting of pears; bacterial blight of English walnut; diseases of small fruits; experiments in 

 prevention of potato scab; internal spotting of potato tubers; onion mildew; alfalfa leaf spot; 

 club root of crucifers; elm leaf spot, tar spot of maple, rose rust, and hollyhock rust. 



Gussow, H. T., Rept. of Dom. Botanist, Central Expt. Farm Rept. 1913: 477-498. General 

 discussion of question of storage rots of potatoes; from experiments on potato rhizoctonia, including 

 liming the soil, treatment of seed with corrosive sublimate, sulphur and lime sulphur, the con- 

 clusion was drawn that no constant differences could be seen from these treatments; of several 

 methods tried out for scab on potatoes, sawdust had little effect, lime sulphur reduced the disease 

 but gave lower yield, and chloride of lime was markedly injurious. The ergot fungus is described; 

 a short summary of McAlpine's investigations in bitter pit is given, and an account of investigation 

 of a storage spot of apples is recorded, the cause not being definitely ascertained. -*■ 



Gussow, H. T., Smtit Diseases of Cultivated Plants and their cause and control. Central Expt. 

 Farm Bui. 73, 1913. Discussion of the various smuts, their life histories, and the methods of 

 control. 



Gussow, H. T., Rept. of Dom. Botanist, Central Expt. Farm Rept. 1914: 834-838 (1 pi.). 

 Of potato diseases, the organism causing common scab is referred to the genus Actinomyces, a 

 note is given on silver scurf, and a black heart is shown to be due to low temperature. In regard 

 to fruit diseases a note on Nectria canker on apples in eastern Canada is given, and another pointing 

 out a type of silver leaf in British Columbia due to a mite which might be mistaken for that 

 produced by Stereum purpureum. 



Gussow, H. T., Powdery Scab of Potatoes. Agr. Gaz. of Canada, Vol. 1, No. 2: 125, 1914. 

 Discusses the United States embargo as it is likely to affect Canadian potato growers. Gives 

 illustrations and description of the disease, notes its occurrence, and outlines means of control. 



Gussow, H. T., International Phytopathological conference at Rome. Agr. Gaz. of Canada, 

 Vol. 1, No. 5; 340, 1914. 



Gussow, H. T., The American Potato Embargo and its removal from the Dominion of Canada. 

 Agr. Gaz. of Canada, Vol. 1, No. 12 : 954, 1914. 



Gussow, H. T., Rept. of Dom. Botanist, Central Expt. Farm Rept. 1915: 951-989. Notes 

 on potato inspection in 1914: losses from improper storage placed at about seventeen per cent 

 prevalance of minor diseases, raising of U. S. embargo for powdery scab. Potato diseases; 

 experiments on the effects of pig, cow, horse, sheep and hen manure on potato ; scab indicated 

 that horse manure increased the amount more than the others while sheep and hen manure gave 

 a crop with least scab; bichloride of mercury is recommended as a seed treatment for Rhizoctonia 

 mention is made of powdery scab, net necrosis, silver scurf, blackleg, leaf roll and mosaic; 

 General account of clover and alfalfa wilt diseases due to Sclerotinia ciborioides (S. trifoliorum). 



Gussow, H. T., The Control of Potato Diseases. Agr. Gaz. of Canada, Vol, 2, No. 4: 323, 1915 



Gussow, H. T., Potato Inspection in Practice. Agr. Gaz. of Canada, Vol. 2, No. 5 : 415, 1915. 



Gussow, H. T., Effect of wet season on Wheat. Agr. Gaz. of Canada, Vol. 2, No. 10: 932, 

 1915. Notes on the occurrence of "sooty ear" of wheat, glume spot of wheat and wheat scab. 



Gussow, H. T., Repeal of the Powdery Scab Regulations. Agr. Gaz. of Canada, Vol. 2, No. 11: 

 1048, 1915. 



Gussow, H. T., Grain Rust in the Prairie Provinces. Agr. Gaz. of Canada, Vol. 3, No. 10: 

 861, 1916. Outline of the general situation in regard to grain rust with recommendations con- 

 cerning future means of elimination. 



Gussow, H. T., Plajit Diseases vs National Wealth. Agr. Gaz. of Canada, Vol. 3, No. 3:211, 

 1916. 



