8o 



CELERY Cl'LTl'RE 



Another form of leaf blii^^ht, and which is com- 

 monly confused with the ordinary blight, is caused 

 by the fungus known as Septoria pctroscHui'^ var. 



FIG. 2,^ — CELERY LEAF AFFECTED WITH A BLIGHT 



(Septoria pctrosclini var. apii) 

 (Redrawn from Halsted) 



apii. In general appearance this disease is very sim- 

 ilar to the ordinary blight, and the treatment is the 

 same in either case. 



Leaf Spot. — This disease, wdiile similar to the 

 blight in its action, is somewhat different in general 



1 N. Y. Expr. Sta. Bui. No. 51. 



