145 



II. Additions to the List of Plant Diseases of Economic 

 Importance in Indiana.' 



George A. Osner, Purdue University. 



The following- list of plant diseases represents collections and ob- 

 servations made by the writer and other members of the staff of the 

 Botanical Department of the Agricultural Experiment Station, mainly 

 during the past season. Specimens of the diseases listed have been de- 

 posited in the herbarium of the Department of Botany, Purdue Univer- 

 sity Agricultural Experiment Station. Unless otherwise stated the 

 collections were made by the writer. 



Barley, (Hordeum sp.). 



Leaf Spot. Helmintliosporium sativum P. K. B. Tippecanoe, June, 

 1917 (H. S. Jackson). HeliiiintJwsporinm. teres Sacc. Tippe- 

 canoe, June, 1917. 

 Bean, (Phaseolus vulgaris L.) 



Leaf Spot. PhyUosticta phaseolina Sacc. Wells, August, 1917 (H. 

 V. Knight). This disease has been reported previously on cow- 

 peas." 

 Mosaic. Cause not known, Allen, July, 1917; Tippecanoe, August, 

 1917. This disease was very common during the past season. 

 Bean, Lima (Phaseolus lunatiis var. macrocarpus Benth.). 



Mosaic. Cause not known. Marshall, August, 1916; Tippecanoe, 

 July, 1917. 

 Blue Grass (Poa pratensis L.). 



Ergot, Claviceps microcephala (Wal.) Tul. Tippecanoe, July, 1917. 

 This disease has been reported previously on orchard grass and 

 timothy.^ 



^ This list is supplementary to "A List of Plant Diseases of Economic Importance in 

 Indiana," by F. J. Pipal, Ind. Acad. Sci. Proc. 1915: 379-413, and to "Additions to the 

 List of Plant Diseases of Economic Importance in Indiana," by Geo. A. Osner, Ind. Acad. 

 Sci. Proc. 1916: 327-332. 



Contribution from the Department of Botany, Pui'due University Agricultural Sta- 

 tion, Lafayette, Indiana. 



- Osner, Geo. A. Ind. Acad. Sci. Proc. 1916 : 328. 



3 Osner, Geo. A. Ind. Acad. Sci. Proc. 1916. 



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