Notes and Brief Articles 



337 



Plans for the summer field- meeting of cereal pathologists, July 

 19-22, at University Farm, St. Paul, Minnesota, included excur- 

 sions to grain fields, elevators and mills in the vicinity of Minne- 

 apolis and Fargo. A number of foreign plant pathologists were 

 in attendance. 



Professor Massey, of Cornell University, has found by an ex- 

 periment covering a period of three years that crown canker, 

 Cylindrocladhim scoparium Morg., causes a loss in the case of 

 Ophelia roses grown under glass of about ten blossoms, or one 

 dollar, per plant. See Phytopathology for March, 1921. 



Barlot has experimented with various chemicals for color reac- 

 tions to distinguish poisonous and non-poisonous species of Ama- 

 nita (Compt. Rend. 170 : 679-681. 1920). For example, he found 

 that three deadly species turned black when treated with drops of 

 fresh blood to which potassium ferrocyanide had been added. 



A paper by Saccardo, entitled " Mycetes Boreali-Americani," 

 which appeared in the Nnovo Giornalc Botanico Italiano for 1920, 

 includes notes on 98 species of fungi sent by Weir from the North- 

 west for determination. Thirty of these species were described 

 as new, most 'of them in the groups with which Saccardo was 

 familiar. 



Investigations of Cronartium ribicola in 1920 by Pennington 

 and others brought out two very important points : that species of 

 Ribes are often killed by intensive outbreaks of the fungus in a 

 definite area, and that the aeciospores may be blown an indefinite 

 number of miles and cause new infections on Ribes. See Phyto- 

 pathology for April, 1921. 



A glume blotch of wheat, caused by Septoria nodorum Berk., 

 has been under observation for three seasons about Fayetteville, 

 Arkansas, and Mr. H. R. Rosen has now published an account of 

 it in Bulletin 175 of the Arkansas Agricultural Experiment Sta- 

 tion. He considers it next in importance to leaf rust as a disease 

 of wheat in Arkansas. 



