Chrysanthciiujni Diseases 243 



Po WD r: R Y Mild k w 



Caused by Oidiutn chrysanthemi llobh. 



This is a very coiiiiiion troubh^ of indoor cbrys- 

 antliemunis. Affected leaves becoiiu* covered with 

 a f)owdcry white growtli. It seems tJiat the Oidiiini 

 or summer stage is the only one that occurs on af- 

 fected |)l:mts. The winter or ascus stag(; has not 

 yet been recorded. Tlie trouble may be controlled 

 in the same way as the rose mildew (see |). 323). 

 Some growers f)ref(T to usct sulphur by mixing it 

 with an oil and applying it to the steam pipes as a 

 paint. 



CrNi.RAiUA {Cineraria crucnfa) 



Cultural Considerations. Tint culture of this 

 j^lant is very simple. However, it should be kept 

 in mind that it is injured by hot dry air and sensi- 

 tive to slight frost. The plant should be syringed 

 practically every day, winter or summer. It also 

 requires a cool shaded part in the house. 



Fungi Recorded on the Cinj.raria 



The Cineraria, it seems, is very hardy. The fol- 

 lowing fungi have been found on weakened or dead 

 parts of the plant: Mcidiurn cineraria: Uosti, Asco- 

 chyta jibricola Sacc, Coleosporium sonchi (Pers.) 

 Lev., Leptospharia vagabunda Sacc., Vuccinia crio- 

 phore Thum. 



