62 PROTECTION OF PLANTS — 1924-25 



3. Bur kholder, Walter H. The gamma strain of Colletotrichum lindemu- 



thianum (Sacc. ;& Magn.) B. & C. Phytopath. 13: 316-324, 1923. 



4 . Dominion Bureau of Statistics. Monthly bulletin of agriculture statis- 



tics. Vol. 16, No. 173, Jan. 1923. 



5. Edgerton, C. W., and Moreland, C.C. Experiments on varietal rests- 



tance to the bean and cotton anthracnose diseases. La. Agr. Exp 

 Sta. Bui. 155. 1916. 



6. Leach, J. G. The parasitism of Colletoti-ichum lindemuthianum. 



University of Minn. Agr. Exp. Sta. Technical Bui. 14, 1923. 



7. Scott, G. A. Cu'lturafrl characteristics of certain Colletotrichum spe- 



cies. Ann Kept. Quebec Soc. Prot. Plants. 16: 1924: 123-137, 1925 



8. Shear, C. L. and Wood, Anna K. Studies of fungous parasites belong- 



ing to the genus Glomerella. U. S. Plant Indust. Bur. Bui. 252. 1913 



9. Young, H. C. and Bennet, C. W. Growth of some parasitic fungi in 



synthetic culture media. Am. Jour. Bot. 9: 459-469. 1922. 



PRELIMINARY REPORT ON A DISEASE OF COMMON BEAN 



K. A. Harrison, B.S.A., M.Sc 

 Introduction 



During the fall of 1924 while engaged in isolating cultures for a study 

 of the physiological specialization in Colletotrichum lindemuthianum an organism 

 was secured from a bean pod which later was considered as being identical 

 with or very closely approximating the organism that is described as Phyllos- 

 ticta phaseolina Sacc. 



A search of the available literature has not given a very full description of 

 the organism and disease and but very little as to its range. Martin (1) reports 

 it as occurring on Phaseolus diversifolius in 1886. Farlow (2) in 1888 in his host 

 ndex records that it is on the same host and also on Phaseolus vulgaris. Keller- 

 man collected it in Ohio, in 1901 on Shjlosanthes hiflora (L.) B.P.S. Harter (3) 

 in an article on pod blight of lima beans caused by Phoma subcircianata E. & E. 

 states that the two diseases may be confused and states that the following 

 reports have been made; New Hersej^ (Ellis), Canada (Dearness) on Phaseolus 

 perennis, Missouri (Galloway) and on cowpea, Kansas (D.B. Swingle). Coons 

 (4) in 1916 reported a leaf spot on Phaseolus vulgaris which caused some anxiety 

 to the growers in Michigan and states that it was due to a cowpea disease caused 

 by PhyUosticta phaseoli. Cook (5) in a circular on diseases of peas and beans 

 makes no reference to this organism when discussing "Pod Blight and Leaf 

 Spot of Lima Beans {Diaporthe phaseolarum)" , but states that "The disease on 

 the pods and on the leaves was originally supposed to be two distinct diseases". 



Harter, however, in his article on Diaporthe phaseolarum states very defi- 

 nitely that there are two diseases, one a leaf spot and the other a pod blight. 



Apparently the original and only work on the pathogenicity of this or.^a- 

 nism was done l^y C. O. Smith (6), who was certain that he had the Phyllos- 



