DISEASES OF CELERY 79 



check the attack, and the plants will sometimes out- 

 grow the disease, but the product will not be first- 

 class. When the blight has become welj established 

 it is then too late for effective remedial measures, 



FIG. 31 LEAF AFFECTED WITH CELERY BLIGHT (CerCOSpOTO, dpll) 

 (Redrawn from Halsted, N. J. Expr. Sta. Special Bui. 1902) 



and while its progress may be checked it is doubtful 

 if it can be eradicated. If the plants are kept grow- 

 ing vigorously from the very start, and proper culti- 

 vation maintained throughout the growing season, 

 there will be little danger from blight. 



