I20 



FUNGOUS DISEASES. 



serious inroads in different localities. Fig. 24 

 shows a field of cabbage in Racine, Wisconsin, dev- 

 astated by the rot, from which not a single head 

 was harvested. 



While the disease is more important in its rela- 

 tion to cabbage culture, on account of the relative 

 amount of this crop grown, it also affects a number 

 of allied species that belong to the same genus. 



Fig. 24 — Cabbage Field Destroyed by the Rot 



Besides cabbage and cauliflower, kohl-rabi, kale, 

 Brussels sprouts, broccoli and collards are attacked 

 by it, and to a lesser extent it develops in turnips, 

 rutabagas, winter radish and other closely related 

 vegetables. 



Symptoms and Cause. — ^The first indication of 

 the disease is upon the outer leaves of the caUbage 

 and cauliflower, which turn yellow and die in spots. 



