Diseases oe Vegetables 



1329 



CAULIFLOWEK 



Black Rot and Club Root, discussed under cabbage, are the 

 important diseases. 



CELERY 



Blight (Septoria petroselina Desm., var. apii Br. & Cav.), 

 Fig. 386. It is probable that the yellowing of celery leaves, result- 

 ing from unfavorable soil and weather conditions, is sometimes 



Fig. 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 



