juneio, i9i8 Experiments with Coccomyces spp. from Stone Fruits 557 



Table V. — Summary of inoculation experiments with Coccomyces spp. from Prunus 

 pennsylvanica, Madison, Wis., igiy — Continued 



RESULTS 



«-/ See footnotes c to f , Table I. 



(/ See footnote g, Table TI. 



DISCUSSION OF TABLE V 



The first inoculation of series 107 induced no infection. This was 

 evidently due to the unsatisfactory nature of the inoculum, as is witnessed 

 by its low percentage of germination. This inoculum was secured from 

 a strain that had been more than eight months in culture. The last inocu- 

 lation of this series caused less abundant infection than was expected. 

 The cause of this fact is not understood. It may possibly be correlated 

 with the high temperatures that developed in the greenhouse in mid- 

 summer. All other inoculations with strains from P. pennsylvanica 

 caused either moderate or abundant infection. P. pennsylvanica, P. 

 mahaleb (except in the second inoculation of series 12), and P. avium 

 were consistently infected. In one case, after a prolonged incubation 

 period, P. cerasus was infected. A single case of delayed infection like- 



