I* Tli a Problem. 



During the past few years the brown rot fungus, a species of 

 Sclerotinia, has grown increasingly important in the central coaet 

 region* of California largely because of its parasitic attacks upon 

 apricot trees and blossoms. The ripening fruit is likewise often 

 attacked. This fungus occurring in California is locally called 

 Sclerotinia fructigena, but should it be called by this name or by 

 a different name? It was to find definitely if possible the ans- 

 wer to the above question that I undertook the experimental work 

 later described. 



a. In Europe. 



Persoon (1) in 1796 gives the following description of a fruit rot 

 fungus: 



Torula fructigena: cinero-albida. eub rotunda, filorma articulis 

 ova tie. 



Hab. in variis fructibus putridis Pruni domegticae Aaygd. Pereicae. 

 autunmo praecipue frequens in piris putridis, cespitulos crassos sub- 

 rotundus efficiens. Obs. Fila in novo hocce genere nee in capitula 

 stipitata colliguntur, qualia axhibent Moniliae negus digitiforada trunco 

 iaposita, uti in genere Aspergillo locum obtinet, and articulata; articulis 

 deciduis, and glabra einrolicissiiaa sunt, quae in Dematio non observantur. 



The above may be translated: 



