234 REPORT OF THE DEPARTMENT OF BOTANY OF THE 
DISEASES NOT KNOWN TO OCCUR IN NEW YORK, 
I‘or the convenience of those who may wish to pusue the sub- 
ject further there is given here a brief account of the various other 
diseases said to affect alfalfa but which have not yet been observed 
in New York. 
FUNGUS DISEASES. 
Violet root-rot (Rhizoctonia medicaginis DC.)* kills the alfalfa 
in circular spots several feet in diameter. It is a destructive disease 
common in Europe.®8 In this country it seems to be rare, although 
Freeman reports it troublesome in Kansas.®° 
Brown root-rot is a disease having symptoms similar to the pre- 
ceding but caused by a different fungus, viz., Ozomium omnivorum 
Shear.” lt occurs an Dexas}"! Atizona?*yanid siatisass = 
A Fusarium root-rot has been reported from Arizona.™ 
Sclerotinia trifoliorum Eriks. which causes root-rot of clover is 
said to attack also alfalfa. Duggar®® observed a sclerotial root 
disease (fungus not determined) of alfalfa in Alabama. 
Urophlyctis alfalfae (Lagerh.) Magn. produces galls on the roots 
near the crown of the plant. It occurs in Ecuador,®” Europe® and 
England,” but has not been observed in the United States. 
Rust (Uromyces striatus Schroet.) on the leaves is an unimpor- 
tart disease of wide distribution.!° Another rust (Uredo medi- 
caginicola Speg.) is said to occur on the stems of alfalfa in South 
America. | 
Other fungi parasitic on alfalfa leaves are the following: Gloe- 
“De Candolle (23). . 
* Prunet (82); Wagner (105); Prillieux (80, 2:144); Frank (30, 2:515) ; 
Briosi and Cavara (8, No. 225). 
*° Freeman (32). 
*° Shear (94). 
* Cirtis< (20). 
* Toumey (103); Thornber (102). 
* Freeman (32). 
“McCallum (63). 
© Prillieux (80, 2:419); Massee (65, p. 155); Coleman (16). 
—Dupgear 1241p, AT)¢ 
“von Lagerheim (59). 
** Magnus (64). 
° Salmon (88). 
” Freeman (32), Briosi and Cavara (8, No. 4). 
Saccardo (86, -16 5351). 
