226 



BACTERIAL DISEASES OF PLANTS 



lettuce, cabbage, cauliflower, turnips, radish, cucumber, musk- 

 melon, potato, tomato and pepper (ripe and green fruits- 

 faster in the latter), eggplant (ripe fruits), hyacinth (leaf and 

 scape), and onion (bulb and leaf). 



Jones' inoculations failed on ripe oranges, bananas, pears 

 and apples; on cauliflower, sweet potato, beet, asparagus; and 



FIG. 166. Photomicrograph showing separation of cells of carrot due to the 

 action of Bacillus carotovorus. Inoculated from a beef-bouillon culture. Time, 

 2 days. 1915. Organism 3a, in the laboratory several years. 



repeatedly on Irish potato tubers (once successful, however). 

 They also failed on your.g carrot, parsnip and lettuce plants, 

 and on the petioles and stems of the tomato. Most of his early 

 inoculations were made in my laboratory in Washington early 

 in the year (February to April) on roots and fruits from the mar- 



