-29- 



7 Drab (S) 



8 Whitish mycelium but there 

 seem to be no spores 



9 Drab (S) 



10 " 



11 " 



. 12 Cream (S) 



13 Drab (S) 



14 " 

 15 



16 



Strain 1 showed itself in a typical manner on the cherry fruit. 

 Strain 2 failed to develop. Strain 3 was typical. But what happened 

 to strain 4? Instead of appearing as formerly with the smooth, felty- 

 looking, cartridge buff pustules, it appeared in a form so closely resembling 

 strains 1 and 3 that the three strains could not be distinguished. p 

 to this time strains 4 and 12 were alike as far as external appearances 

 were concerned. There was a slight indication of a difference between 

 4 and 12 when the different strains were grown on the apricot fruits the 

 previous year. When grown on the apricot fruits the spores of 12 were 

 the longest of any with no exception. See graphs, plates 1-12. The 

 easiest way to explain the situation would be to say that the cultures 

 were probably mixed. I will not agree to such an explanation. We must 

 toeave the problem without a solution remembering the following: 



Strain 4 which originally had the smooth, f el ty -looking, cartridge 

 buff pustules, and which was called Sclerotinia fructigena. at the Oregon 



