New York Agricultural Experiment Station. lUU 



geranium, oak, onion, pine, potato and turnip. In all of the 

 above the fungus is primarily a root parasite, and it will be 

 seen that it occurs upon fleshy, herbaceous and woody roots. 



BHIZOOTONIA in AMERICA, 



(HistoriGal.) 



Neglecting for the present any such mentions of Rhhoctonia 

 as have been made in " Lists of Fungi," or even brief technical 

 descriptions of new forms, we find in American literature very 

 little concerning Rhizoctonia. In 1891 Pammel^ published some 

 notes on beet diseases, and a beet root-rot was described which 

 he considered due to Rhizoctonia betm Kiihn,^ this fungus hav- 

 ing been mentioned by Kiihn, Eidam and others as an important 

 beet disease in Germany. 



In 1892 Atkinson^ found in Alabama a sterile fungus causing 

 a damping-off of cotton, also called " sore shin." Later he 

 found and described a similar fungus in connection with the 

 damping-off of various seedlings under glass at Ithaca.* 



The above are the chief economic references to the occurrence 

 of Rhizoctonia in America until the appearance of Bulletin 163^ 

 of the Cornell Experiment Station. In December, 1898, the 

 writers presented a paper on Rliixoctonia to the Society for Plant 

 Morphology and Physiology at its meeting in New York City. 

 This paper, which was entitled " Different Types of Plant 

 Diseases due to a Common Rhizoctonia,^^ was published only in 

 abstract.^ During the past year Stone and Smith'^ have published 

 an account of lettuce Rhizoctonia and some experiments on its 



'Pammel, L. H. Bulletin 15. Iowa Agl. Exp. Sta., 1891. 



'Kiihn, J. — 1. c. 



•Atkinson, Geo. F. Some Diseases of Cotton. Bulletin 41, Ala. Asl. 

 Exp. Sta., 1892, pp. 30-39. 



*Atkinson, Geo. F. Damping off. Bulletin 94, Cornell Univ. Agl. Exp. 

 Sta., 1895, pp. 339-342. 



"Duggar, B. M. Three Important Fungous Diseases of the Sugar Beet. 

 (See pp. 339-352.) 



• See Bot. Gaz., 27: 129. 



^ Stone, G. E., and Smith, R. E. The Rotting of Greenhouse Lettuce. 

 Mass. Exp. Sta., Bui. 69. 



