3o6 Diseases of Greenhouse Crops 



GrapMum bulbicola Henn. occurs on pseudo- 

 bulbs of Oncidium pulvinatum. 



Tuhercularia cattleyicola Henn. grows on stems 

 of Cattleya guttata. 



Sclerotium orchidearum Henn. develops on stems 

 of Vanda tricolor, and Dichsea vaginata. 



Diplodia bulbicola Henn. Found on dead 

 pseudo-bulbs of Gomeza planifoUa. i 



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 Phyllosticta nepentheacearum Tassi, 

 and Phoma nepenthis Cook and Mass. Humaria 

 thozetti Beilkl., Excipularia epidendri Hennv 

 Found on dead foliage of Epidendron. 



OxALis {Oxalis bowiei) 



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 : Mcidium oxali'- 

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

 oxalidis Diet, and Ell., Urocystis oxalidis Pazs. 



Palm (Phcenix spp.) 



Cultural Considerations. Palms are very sensi- 

 tive to wet and poorly drained pots or benches. 



