Varietal Resistance of Plums to Brown-Rot 



371 



Table I. — Chlamydo spore measuretnents of Sclera tinia cinerea 



From a comparison of these measurements with those given in Table II, 

 it will be seen that they agree very closely with those obtained by other 

 investigators in this country and are only slightly larger than those 

 given for 5. cinerea by European investigators. They also correspond 

 closely to the measurements given by Aderhold and Ruhland for 5. laxa 

 found on apricots. 



Table II. — Spore and ascus measurements of the brown-rot fungus as given by various 

 investigators 



FROM EUROPEAN SOURCES 



Fungus and investigator. 



Chlamydospores. 



Sclerotinia cinerea: 

 Saccardo (1886) 



Woronin (1900). 



Aderhold and 



Ruhland (1905). 



Matheny (1913) . . . 



Sclerotinia laxa: 



Aderhold and 

 Ruhland (1905). 



Cherry brown-rot : 



Westerdijk(i9i2). . 



Sclerotinia fructigena: 

 Saccardo (1886). . 



Woronin (1900). 



Aderhold and 



Ruhland (1905). 



Matheny (1913). . . 



In culture . 



f Cherry . . . . 



\ Various . . . , 



Peach and 



plum 



Apricot . . . . 



Cherry . 



I Apple 

 In culture 



Apple. 



15 to 17 by 10 to 12. 

 12. 1 by 8.8 to 13.2 



by 9.9 

 17.5 to 24.2 by II. 2 



to 13.2 



13.8 by 9.2 



13.8 by 9.95 



14.4 by 10.8 , 



16. 1 by 10.8. 



121. 5 to 

 149.9 by 

 8.5 to II. 8 



158.4 to 

 171. 6 by 

 7.9 to 8.5 



II. 5 to 13.5 



by 5.2 to 

 6.9 



13.2 to 16.8 



by 4.3 to 



5-2 



25 by 10 to 12 



20.9 by 12.4 to 24.5 



by 13.2 

 23-7 to 30.8 by 14.9 



to 16.5 

 25 by 13 



by II. 



120 to 180 

 by 9 to 12 



II to 12.5 by 

 5.6 to 6.8 



