Parasitism in the Erysiphaceae. 297 



(continued). 



ß e m a r k s. 



19 e, 19 f. ,Subinfection' only. Aug. 23. Weak mycelial flecks and a few 

 scattered conidiophores on a few o£ the inoculated leaves. Aug. 25. 

 Vary weak mycelial flecks and very small scarcely visible patches of 

 scattered conidiophores on the 6 leaves. Aug. 27. Fangus dying away. 

 Aug. 31. Fungus disappeared. 



35 i. ,Subüifection' only. Aug. 31. Signs of slight infection. Sept. 1. 

 Minute flecks of mycelium and minute scattered tufts of conidiophores 

 on 2 of the inoculated leaves, the 2 other inoculated leaves withered. 

 Sept. 4. Fungus dying away. Sept. 9. Fungus disappeared. 



191, 19 m. ,Subinfection' only. Aug. 23. 191. 1 inoculated leaf with a 

 fleck of mycelium. Aug. 23. 6 of the inoculated leaves with either 

 very minute flecks of mycehum or very small patches of scattered 

 conidiophores: controls all free. 



35 g. Sept. 1. A very minute fleck of mycelium with about 6 conidio- 

 phores on 1 of the inoculated leaves. A doubtful case of ,subinfection'. 



Gib, 64c, ,Subinfection' only. Sept. 15. Faint signs of very slight in- 

 fection oh some of the inoculated leaves. Sept. 1: A few very scat- 

 tered tufts of conidiophores on 4 of the inoculated leaves; all controls 

 free. 



28 b. Aug. 26. Flecks of mycelium on some of the inoculated leaves. 

 Aug. 27. All the 3 leaves with mycelial flecks, in one case bearing 

 conidiophores. Aug. 31. All the infected leaves with very powdery 

 masses of spores. Sept. 3. Fangus spreading to controls. 



35b, 35 c. Aug. 31. Most of the inoculated leaves clearly infected. Sept. 1. 

 The 7 inoculated leaves with mycelial patches bearing conidiophores. 

 Sept. 4. The infected leaves with powdery masses of spores. 



59 c. Sept. 10. Faint signs of infection. Sept. 12. Minute flecks of myce- 

 lium on 1 leaf. Sept. 15. All 5 leaves strongly infected with numerous 

 and vigorous patches of mycelium bearing groups of conidiophores. 

 Sept. 16. Spores very powdery on the infected leaves. 



64 d, Sept. 15. All the inoculated leaves with vigorous patches of myce- 

 lium and groups of conidiophores; controls all free, Sept. 17. The 

 infected leaves with almost powdery masses of spores; all controls 

 still free. 



