3o6 Diseases of Greenhouse Crops 



Graphium hulhicola Henn. occurs on pseudo- 

 bulbs of Oncidium pulvinatum. 



Tubercularia cattleyicola Henn. grows on stems 

 of Cattleya guttata. 



Sclerotium orchidearum Henn. develops on stems 

 of Vanda tricolor, and Dichsea vaginata. 



Diplodia hulhicola Henn. Found on dead 

 pseudo-bulbs of Gomeza plani folia. \ 



Zythia nepenthis Henn. Found on dead leaves 

 of Nepenthes bicolorarta. Of the other fungi which 

 are often found on dead foliage of Nepenthes may 

 be mentioned Fhyllosticta nepenthe ace arum Tassi, 

 and Fhoma nepenthis Cook and Mass. Humaria 

 thozetti Beilkj., Excipularia epdendri Hennc 

 Found on dead foliage of Epidendron. 



OxALis {Oxalis hoiviei) 



Cultural Considerations. Oxalis is forced mainly 

 as a window plant grown in baskets or pots. It 

 requires a rich soil and an abundance of water. 

 The flowers open only when exposed to full light. 



Fungi Recorded on Oxalis 



The Oxalis is a very hardy plant. The following 

 are the fungi recorded on the host: JEcidium oxali- 

 dis Thuem., Darluca filum (Biv.) Cast., Fuccinia 

 oxalidis Diet, and Ell., Urocystis oxalidis Pazs. 



Palm {Fhcanix spp.) 



Cultural Considerations. Palms are very sensi- 

 tive to wet and poorly drained pots or benches. 



