Fi^ s The edible portion of a cauliflower cut in two with a sterilized knife and inoculated 

 with a%ure culture of B.nlrmrrar by means of a single needle prick in the centre ot the flo«er 

 Note the blackened portion which was softened to a considerable depth and also the water drops 

 upon the blackened area. 



Fig M Cross section of part of the petiole of a diseased cauliflower inoculated with a pure • 

 culture of ■/?. olerarmr. Note the bacteria in the intercellular spaces and their penetration along 

 the middle lamella. 



[31] 



