REPORT OF THE SOCIETY 87 



While the causes for the three latter conditions are not very difficult to explain 

 the reasons for immunity and resistance are very complex. The principal cau- 

 ses apparently are anatomical modifications and biochemical refactions. The 

 writer believes that the future research on this subject will lie largely in the 

 field of biochemist^5^ A very extensive bibliography is appended. 



Kelsall, A. Dusts ^nd Dusting in Crop Peat Control. Sci. Agric. 5: 37-51. 

 1924. 



Miaheux, Georges. Millardet — the creator of applied phytopathology. 

 16th Ann. Kept. Que. Cos. Prot. Plants for 1923-1924: 57-60. 1924.— A sketch 

 of the work of this investigator to whom belongs the credit of improving and 

 introducing to general use the solution which later became kno^vn as Bordeaux 

 mixture. It is noted that the action of copper sulphate on fungi had been first 

 recorded in 1807 by Benedict Prevost. In 1914 a beautiful monument in me- 

 mory of Millardet was erected by the grape growers of France in the botanical 

 garden at Bordeaux. 



McCalliim, A. W. Abstracts of Canadian plant pathological literature. 

 16th Ann. Rept. Que. Soc. Prot. Plants for 1923-1924: 145-147. 1924. 



Newton, R., and W. R. Brown. Is the Apparent Winter-Killing of Sweet 

 Clover and Red Clover a Result of Disease injury? Sci. Agric. 5: 93-96. Fig. 

 1-4. 1924. — White sweet clover which was thought to have suffered winter 

 injur}' was found to contain black sclerotia and the injury is probably due to 

 Sclerotinia sp. In red clover the indications are that this fungus is an impor- 

 tant contributory factor to the apparent winter injury. 



Scod, G. A. Cultural characteristics of certain Colletotrichum species. 

 16th Ann. Rept. Que. Soc. Prot. Plants for 1923-1924: 123-137. PI. 1-5. 1924. 

 — Five fungi-Vermicularia varicnis, Colletotrichum tabificum, C. atramentarium, 

 C. atrovirens, and a form isolated in Quebec — which have been found associated 

 with black dot of potatoes were studied both from the morphological and phy- 

 siological points of view. As a result the writer concludes that these organisms 

 are identical. A sixth form — a variant of the Quebec fungus — was found to 

 differ somewhat from the others. 



Shoemaker, J. S. Lime Sulphur injury. Sci. Agric. 4: 180-184. 1924. 



Stone, R. E. Prehminary investigations on the Root-Rot and Blight of 

 Canning Peas. Sci. Agric. 4: 239-241. Fig. 1-2. 1924.— In some parts of 

 Ontario, particularly along the north shore of Lake Ontaiio, growers of canning 

 peas have suffered much loss from a disease which is apparentlj' a root rot. 

 Investigation showed that several organisms are associated with this trouble 

 but that Fusarium vasinfectum var. pisi and Pythium deharyanum are cons- 

 tantly present. Inoculations with these forms produced the typical diseased 



