Hyacinth Diseases 269 



RESISTANT NON-RESISTANT 



Single Dark Blue 

 King of the Blues Argus 



General Havelock 

 King of the Blacks 

 Masterpiece 

 Mimosa 

 Single Yellow and Orange 

 King of the Yellows Bird of Paradise 



Yellow Hammer Hermann 



Ida 



La citromere 

 L'or d'Australie 



Double Red 

 Double Rose 



Princesse Royale 

 Bouquet Royal 



Double White 



Flevo Florence Nightingale 



La Virginity Grand Vain Queen 



La Tour d'Auvergne 

 Double Dark Blue 

 Crown Prince of Sweden 



In Holland the disease is kept in check by the de- 

 struction of diseased plants. Diseased bulbs should 

 never be planted since they will surely introduce 

 the disease in new localities. Spraying in this case 

 will be of no benefit. 



Damping Off 



Caused by Dictyuchus monosporus Seitg. 



Symptoms, The above fungus causes a serious 

 damping off, the symptoms of which resemble those 

 of other plants. Dictyuchus monosporus is the only 

 one of the genus Saprolginiacese which is reported 

 by Halsted as being parasitic on plants. 



The Organism, The sporangia are clavate. The 

 swarm spores become walled within the sporangium 



