-61- 



conventional electron microscopy of thin sections. 

 However, they can be differentiated from cylindrical 

 inclusions by gold labelling without any difficulty. 



Thin sectioning, VaMo negative staining, 

 immunofluorescence microscopy, and protein A-gold labelling 

 described in this chapter confirmed that light microscopy 

 was an accurate and useful method for detecting orchid 

 viruses . 



