1916] PARASITIC RIIIZOCTONIAS IN AMERICA 307 



Belgium. R. Crocorum has been observed in Belgium on sugar 

 beet, potato, and asparagus. 



Denmark. Ei. Rostrup, 90 ' 97 during the years 1884-1905, reported 

 Rhizoctonia in Denmark on a large number of hosts, including many 

 weeds and the roots of several species of forest trees. Among the 

 cultivated crops mentioned are carrot, clover, lucerne, kohl-rabi, beet, 

 turnip, sugar beet, and potato. Both R. Solani and R. Crocorum 

 were observed on the potato. In 1892 Rostrup described a new species 

 from turnip, which he called Rliizoctonia fusca and which differed 

 only in one or two essential characters from R. Crocorum, also found 

 on turnip. 



England. Rhizoctonia was first reported in England on mangel 

 in 1901, and on potato in 1904. The next year Giissow, 48 in an ex- 

 tended account of this disease, stated that it was due to R. Solani. 

 Salmon, 101 in working on a disease of seakale due to R. Crocorum , 

 found that it was also able to attack salsify, parsnip, carrot, parsley, 

 lettuce, and potato. 



Finland. Reuter 91 has studied a Rhizoctonia in Finland which 

 causes a root rot of rye. R. Crocorum has been found on beet. 



France. Between the discovery of R. Crocorum in France in 

 1728, on crocus, and 1851, a number of hosts, including asparagus, 

 bean, clover, Citrus, Coronilla, grape, onion, Rubia, Sambucus, and 

 tulip, were reported. 



Germany. In 1858 Kuhn 64 found R. Crocorum on sugar beet in 

 Germany and described the species R. Solani on potato and carrot. 



Eriksson 38 states that in Germany in 1893 R. Crocorum appeared 

 on sugar beet in several places ; on lucerne, in 55 localities on plants 

 1 to 5 years old ; on potato, in 11 localities ; on asparagus, in 3 locali- 

 ties ; on hop, in 1 locality ; and also on a f ew weeds, such as Taraxacum 

 officinale, Convolvulus arvensis, etc. ; and that in 1894 it was observed 

 on lucerne, in 77 localities; on potato, in 11 localities; and on red 

 clover, in 8 localities. The species R. Solani (Corticium vagum) and 

 R. Strobi Scholtz on white pine, have beeru recorded. 



Holland. Dr. Johanna Westerdijk reports both R. Crocorum and 

 R. Solani as being very abundant on potato in Holland. 



Ireland. Pethybridge 83 ' 55 has shown that both R. Crocorum and 

 R. Solani are present on potato in Ireland. 



Italy. R. Crocorum has been reported at various times as present 

 on alfalfa, sugar beet, clover, asparagus, carrot, parsley, chard, the 

 roots of grape, and many weeds in Italy. Rhizoctonia destruens Tassi 

 occurs on the roots of Delphinium. 



Portugal. The Rhizoctonia attacking sugar beet has been reported 

 from two localities in Portugal. 



Russia. R. Solani was reported on potato in Russia in 1899. 



