356 



Edwin F. Hopkins 



Fig. 50. proliferation- of comdiophore. X <S40 

 .Showing new branches arising from conidial cluster. (Photomicrograph) 



Until further experiments have been made, soil treatment cannot be 

 recommended. Carbolineum has been recommended in the literature as a 

 disinfectant for soil (Elenkin, 1911). Klebahn (1904:33) criticizes this 

 method unfavorably, saying that not even weeds will grow in soil thus 

 treated. 



Experiments made at Madison, Wisconsin, in 1917, showed that spraying 

 tulips with bordeaux mixture 5-5-50 caused considerable injury to both 

 the leaves and the flowers, besides giving them an unsightly appearance. 

 Accordingly this treatment is not to be recommended. 



From the present knowledge of this disease the following measures 

 seem advisable: 



1. Selection of clean bulbs, free from lesions and sclerotia. When 

 the sclerotia occur only on the outer papery scale this should be removed 

 and burned. It is well also to inspect the old stalk of the previous year, 

 if this still remains attached, for it frequently bears sclerotia (fig. 22;. 



