Croton Diseases 247 



Anthracnose 



Caused by Glceosporium soraurianum All. 



Symptoms. This disease is manifested as large 

 yellowish-gray spots on the leaves, which become 

 whitish, dry and brittle with age. The spots are 

 more visible on the upper part, although they work 

 down through the entire thickness of the leaf. The 

 acervuli are usually formed within the spots and 

 become apparent as salmon-colored, gelatinized dots. 

 The causal organism resembles other Glceosporium 

 in structure. G. soraurianum is probably the same 

 as G. crotonis Del., also found to attack croton 

 leaves. 



CowJYLiNE \Cordyline aus trans') 



Cultural Considerations. This plant greatly re- 

 sembles dracenas. Cordylines are usually grown in 

 pots. They require a warm moist atmosphere, and 

 are sensitive to full light. However, during the 

 fall they should be kept drier, and exposed to full 

 light in order to better bring out the color of the 

 foliage. 



Fungi Recorded on the Cordyline 



The plant is apparently very hardy. The follow- 

 ing fungi have been recorded: Colletotrichum cordy- 

 lines Polla., Macrophoma cordylines (Thum.) Berl. 

 and V<^1., Fhyllachora vervisegiua West., Fhyllos- 

 ticta cordylines Sacc. and Berl. 



