For assessing the internalblack rot index (IBR index), cabbage heads were cut perpendicularly into quarters and the internal symptoms were assessed as follows:0 = No discoloration, no symptoms on the heart leaves (healthy plants); 1 = vein discoloration extends 1/2 ofthe stem, no symptoms on the heart leaves; 3 = vein discolorationof stem and 1–3 of the heart leaves and 4 = vein discoloration ofstem and on more than 3 heart leaves (Wulff et al., 2002). ForHBR index and IBR index, a–e correspond to the number of plantsin the infection category; T is the total number of plants