New York Agricultural Experiment Station. 107 



tlie latteT, ulcevatf^d areas at or below tbe surface of the soil often 

 characterize the disease. Plants set in the field are not known 

 to be affected. An examination of the Illinois material showed 

 that a Rhizoctonia was constantly, present in abundance, and 

 undoubtedly the cause of the trouble. RJiizoctonia has also been 

 found causing a disease of cauliflower seedlings at Geneva. The 

 plants were ulcerated at the bases of the stems, sometimes the 

 entire cortex having disappeared. 



ON THE carrot/ 



(Daiicus carota.) 



The hasty examination of a few carrot fields in August, 1900, 

 resulted in the finding of a few plants affected with Rhizoctonia. 

 In a field at Flint, N. Y., two specimens were found, and in 

 another field near Phelps, N. Y.^ about a dozen more. In every 

 case the plants were affected at the crown. The leaves were 

 all dead, their bases being rotted off and thickly covered with 

 Rliizoctonia hyphse. About half an inch of the upper portion of 

 the root was also rotten, but the disease showed no tendency to 

 run down the root. In some of the specimens there were indica- 

 tions that the rot had been initiated by ^ome larva boring into 

 the crown of the plant. 



Kiihn^ and others have reported the occurrence of Rhizoctonia 



on carrots in Germany, but we believe that up to the present 



time there is no record of the occurrence of such a disease in 



America, 



ON the celery, 



(Apium graveolens.) 



Our knowledge of the occurrence of Rhizoctonia on celery is 

 confined to two cases in which it was the cause of a destructive 

 damping off of celery seedlings. Both of these cases we.e 

 observed in June, 1899. The first one occurred in one of the 

 Station greenhouses at Geneva, and the other in a greenhouse at 

 Poughkeepsie where celery plants were grown extensively. In 



'Kiihn, J. Krankheiten der Kulturgewiichse, p. 224. 



