CLADOSPORIUM 



47i 



stem of diseased plants. The young fruit is also sometimes 

 attacked. 



The fungus is Cladosporium fulvum (Cke.) 



The conidiophores are densely crowded, and emerge 

 through the cuticle in clusters. They are usually sparingly 

 branched, septate, and nodulose, bearing a few conidia near 

 the apex, tinged brown ; conidia elliptic-oblong, i -septate, 

 translucent, tawny-brown, 10-20X4-6 /x. 



Spray with a dilute solution of potassium sulphide, or with 



FIG. 140. Cladosporium fulvum. i, under surface of 

 a 'diseased leaf; 2, a cluster of conidiophores bearing 

 conidia, highly mag, 



half strength Bordeaux mixture. Spraying, however, is of 

 but little use unless commenced at an early stage of the dis- 

 ease. Remove and burn plants that are badly diseased, as 

 the spores diffuse quickly, and an epidemic that cannot be 

 checked is the result of negligence. 



Gummosis of Primus japonica (Cladosporium epiphyllum, 

 Fr.) either killed or severely injured a considerable number 

 of examples of the beautiful flowering shrub, Prunus japonica, 

 growing in Kew Gardens. The injury was of the nature 



