14 



BACTERIAL DISEASES OF PLANTS 



Fig. 6. — Angular leaf-spot on cucumber due to stomatal infections produced 

 by spraying-on Bacterium lachrymans Smith and Bryan. It shows breaking of 

 tissue around old spots. Time, 12 days. 



Fig. 7. — Cucumber stem showing white bacterial film and cracks due to Bac- 

 terium lachrymans. Inoculated by spraying May 6, 1915. Photographed May 20. 

 X 14. 



