Plate 28. Upper. Photograph showing result 



of inoculating a quince with 

 spore raoteric;! from a n turally 

 infected apricot. 



Inoculated Sept. 28, 1914 

 Photographed about October 21 f 1914 



Lo**er, A. Sjslerotinia cinerea, color 



of pustules. Copied from Woronin'a 

 work in St. Petersbourg Acadomie 

 Mtmoires &er. Viii, V. 10, pi. IV, 



1900. 



f ~cl c r Q t inia f ru c ti g:e <ia . color 

 of pv.*itulee. Sa^e source as A. 



C. California Apricot rot, 

 Sclcrotlnia. strai.n 1, 

 Showing color of puetula* on 

 prune juice and bread culture in 

 a flask.. 23 day* old. This 

 color it typicul. 



D. Color of gonidial aoae* of 

 strain 1 when grown on sterilized 



reen beans in a test tube. 

 Culture 2 months old. 



