Arthur S. Horne and Eleanor Violet Horne 1 93 



Cephalothecium roseum; Newton Wonder, Polyopeus purpureas, fungus b 

 four times and Cladosporium epiphyllum twice; Potts's Seedling, Poly- 

 opeus. purpureas, Cladosporium epiphyllum, Fusarium mali, and un- 

 identified fungi ;Ecklinville Seedling, Dematium pullulans 1 and fungus b; 

 Bramley's Seedling, Pleospora pomorum, Cladosporium epiphyllum 2, and 

 unidentified fungi; Peasgood's Nonsuch, unidentified fungi (reddish 

 brown spots). 



(a) (b) 



Fig. 2 (a). Photographic reproduction of an apple inoculated with conidia of Pleospora at 

 two points, after seven weeks, showing infertile perithecia (see Fig. 3 a for repre- 

 sentation of the same apple after two weeks). 



(b) Photographic representation of an apple inoculated with conidia of Pleospora at four 

 points, after seven weeks (see Fig. 3 d for a diagrammatic representation of the same 

 apple). 



5. Inoculations with Pleospora 3 pomorum Horne. 



On Jan. 17th, 1917, an apple of unknown variety was inoculated at 

 four points by introducing, through punctures made with a sterile needle, 

 fragments of mycelium bearing conidia (Stemphylium) of Pleospora 

 pomorum. Five days afterwards, spots w T ere observed at the points of in- 

 oculation. On Feb. 22nd, large dark brown areas had developed, and the 

 apple was rotting. Since other spots had formed at points not inoculated 

 another sound apple was inoculated on Jan. 17th, and a number of 



1 Also isolated from Allington Pippin, Christie Manson, Crawley Beauty, Lord Suffield, 

 Tamplin, Scarlet Nonpariel, Stirling Castle. 



2 Also isolated from small spots in association with other fungi in Christie Manson, 

 Landsburger Reinette, Lord Suffield, Tamplin and Winter Quarrenden. 



3 A full account of the reactions to various media is omitted for reasons of space. 



