

RESISTANT DETROIT 
*55 days @ Conforms in type with Copenhagen Market 
from which it was selected. Heads are globular to slightly 
flattened. Contains about 80% resistance. 
*Days from setting of plants to maturity as deter- 
mined under favorable conditions in Wisconsin. 




SSR 




Section of greenhouse showing the breeding of new 
resistant strains and improvement of the present 
varieties. 
Typical stock seed plant grown on Yellows sick soil. 
Breeding grounds where the seed produced in the 
greenhouse is checked, and the undesirable and 
susceptible plants are eliminated. Note the bamboo 
stakes marking ‘’Sick’’ plants, also 2 rows commercial 
strains (non-resistant) practically wiped out by the 
disease, proving that the soil of the trial grounds is 
heavily infested with the ‘’Yellows.”’ 
