-18- 



Strains 9, 10, 11, 12 were not given a specific name by Dr. 

 Weeterdijk. 



Washington prune blossom Sclerotinia designated as strain 13 

 was isolated from prune blossoms obtained in Clarke County, Washington 

 and forwarded here by Dr. F. P. Heald. 



Washington prune Sclerotinia designated as strain 1 was isolated 

 from prune mummide obtained in Clarke County, Washington and forwarded 

 here by Dr. F. D. Heald. 



Prunus demisca Sclerotinia designated as strain IS was obtained 

 from Wuahing ton through Dr. Heald, where it causes a common blight and 

 rot of the fruit of Primus demissa. 



Amelanchifer Sclerotinia designated at strain 16 is a Sclerotinia 



t 



tiuit is found on the Amelanchier in the Palcuse Country, Washington. 

 It was sent here by Dr. Heald. 



The best plan for studying these different strains and for 

 Arriving at some solution of the problem, namely the identification 

 of our species, seemed to be to grow the strains on fresh fruits, as well 

 as on prepared media, and to observe the type and color of growth, site 

 and shape of spores, and other noticeable features. In the first series 

 of inoculations ripe apricots were used. 



b. Apricot inoculations to obtain rate of growth, type of growth, 

 color of conidia, and approximate sizos of eonidia. 



The first twelve strains were used to inoculate fresh rips apricots. 

 Attempts to sterilize the apricots before inoculating injured the fruit 

 so much, that the apricots vere finally inoculated just *.e they were 



