Diseases oF VEGETABLES 13829 
CAULIFLOWER 
Black Rot and Club Root, discussed under cabbage, are the 
important diseases. 
CELERY 
Blight (Septoria petroselina Desm., var. apti Br. & Cav.), 
Fig. 386. It is probable that the yellowing of celery leaves, result- 
ing from unfavorable soil and weather conditions, is sometimes 
Fie. 386.— CELERY BLIGHT 
called blight. True blight is, however, caused only by the attack 
of a fungus. It can be readily distinguished from all other 
troubles by the presence of brown dead spots in the leaves and 
rusty brown areas on the stalks, in both of which there occur 
small black specks, readily observed only on close observation. 
Thorough spraying with bordeaux, 5-5-50, effectively controls the 
disease. It can sometimes be checked to a certain extent by begin- 
ning spraying after it has appeared, but generally satisfactory 
