Studies on the Fire-Blight Organism, Bacillus amylovorus 43 



TABLE 10. 



Blossom Inoculations in Relation to Age and Pollination, May to 

 June, 1926 



* Center blossoms opened on May 28. Lateral blossoms opened one and two days later. 



t Center blossoms opened on June 5 and June 6. Lateral blossoms opened on June 6 and June 7. 



rechecked a week later. Owing to the short blossoming period, many 

 of the blossoms in the older series formed abscission layers and fell 

 before the fire-blighl organisms from an adjoining blossom could 

 traverse the pedicels and invade them. Thus, in the 24- and the 48- 

 hour series the entire cluster was usually blighted when one blossom 

 became infected, while in the 96- and the 120-hour series there were 

 frequently one or two blighted blossoms in a cluster and the remainder 



