128 



Journal of Agricultural Research voi. xviii. No. 3 



that case, and as explained by Peltier {11), the extremely wet summer 

 in 1 91 5 at Urbana, 111., together with an average low temperature of 74° F. 

 may account for the sudden appearance of the disease. 5. rolfsii may 

 not be able to withstand the cold winters of Illinois, in which case there 

 should be no fear of its further spread. However, should it withstand 

 the cold winters of Illinois, it would be reasonable to suppose that it 

 is adapted to colder climates, and that if not guarded against may spread 

 to other Northern States. Failure by Halsted and by the writer to infect 

 plants in New Jersey and in Delaware may be explained by the fact that 

 both worked with strains grown too long on artificial media. This, how- 

 ever, needs further verification. 



HOST PLANTS 



Sclerotium rolfsii is known to attack a large number of various genera 

 and species of plants. Table I shows the wide adaptability of this fungus 

 to different hosts. 



Table I. — Hosts affected by Sclerotium rolfsii 



Authority. 



Arachis hypogaea. 



Beta vulgaris. 



Brassica oleracea. 



Capsicum annum.. 



Cucurbit a spp 



Citrullus vulgaris . 



Chrysanthemum spp 



Campanula spp 



Colocasia esculenta 



Daphne spp 



Dianthtis plumarius 



Dracocephaium argenese . . . 



Edgezvorthia papyrifera 



Epilobiwm angustifolium. . 



Erigeron spp 



Expatorium, ageratoides . . . 



Ficus carica 



Fragaria spp 



Gossypium hirsutum 



Hydrangea pani. . . 

 Ipom.oea purpurea. 



Lycopersicum, esculentum. 



Phaseolus vulgaris. 



Earle, F. S 



Rolfs, P. H 



McClintock, J. A. 

 Taubenhaus, J. J. 



Earle, F. S 



Rolfs, P. H 



do.... 



Taubenhaus, J. J. 



Fulton, H. R 



Taubenhaus, J. J. 



Rolfs, P. H 



Taubenhaus, J. J. 



Rolfs, P. H 



Taubenhaus, J. J. 



Rolfs, P. H 



Peltier, G. L 



Harter, L. L 



Rolfs, P. H 



Peltier, G. L 



...do 



Fulton, H. R 



Rolfs, P. H 



....do 



Peltier, G. L 



Rolfs, P. H 



Earle, F. S ..*... . 



Rolfs, P. H 



Taubenhaus, J.J. 



Rolfs, P. H 



do 



Taubenhaus, J.J. 



Rolfs, P. H 



Earle, F. S 



Taubenhaus, J. J. 



Earle, F. S 



Fulton, H. R 



Rolfs, P. H 



Year. 



1900 



1896 



1917 



1917,1918 



1900 



1896 



1896 



1916, 1918 



1908 



1917,1918 



1896 



1918 



1896 



1916, 1917, 1918 



1896 



1916 



1916 



1896 



1916 



I916 



I918 



1896 



1896 



1916 



1896 



1900 



1896 



1917,1918 



1896 



1896 



I917 



1893,1898 



1900 



1916, 1917, 1918 

 1900 



State. 



Alabama. 

 Florida. 

 Virginia. 

 Texas. 

 Alabama. 

 Florida. 

 Do. 

 Texas. 

 Louisiana. 

 Texas. 

 Florida. 

 Texas. 

 Florida. 

 Texas. 

 Florida. 

 Illinois. 



Florida. 

 Illinois. 



Do. 

 Louisiana. 

 Florida. 



Do. 

 Illinois. 

 Florida. 

 Alabama. 

 Florida. 

 Texas. 

 Florida. 



Do. 



Do. 

 Alabama. 

 Texas. 

 Alabama. 

 Louisiana. 

 Florida. 



