PLATE 13 



A. — Cucumber leaf five days after inoculation with Bacterium lachrymans, showing 

 severe infection. The dark, angular spots had a water-soaked appearance. Drops 

 of bacterial exudate may be seen on some of the spots. Photographed by Mr. Fred 

 R. Jones. 



B. — Plant a, photographed seven days after inoculation with Bact. lachrymans 

 shows considerable stunting as compared with the uninoculated control, plant b. 

 Yoimg plants as severely attacked have often been seen in the field. 



