CHAPTER 22 



HYACINTH {Hyacinthus orientalis) 



Cultural Considerations. In forcing (fig. 57, a) 

 hyacinths it is important that they start with a well 

 developed roof system. Otherwise the culture is the 

 same as for narcissus (see p. 287). 



Diseases of the Hyacinth 



The few diseases which hyacinths are subject to 

 are serious. Most of these, no doubt, have been 

 brought in with imported bulbs. 



GuMOSIS 



Cause, physiological. 



Symptoms. This trouble is characterized by the 

 formation of pure white gum pockets between the 

 epidermis and lower tissue. In this case the starch 

 apparently becomes replaced by gum through a proc- 

 ess of degeneration. The gum bearing cells often 

 enlarge abnormally. The true cause of this trouble 

 is unknown, but it is generally attributed to im- 

 proper culture. 



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