28 



Bacterioloofical examination of the disease present in the different 

 varieties showed that we were working with the same bacterial 

 disease. The amount of disease present is shown in the following 

 list of varieties : — 



Immune : Jersey Navel. 



Less than 5 per cent. Rotted : Greystone Improved, Puiple Top 

 Mammoth, Early American Purple Top, Red Top Strap Leaf, White 

 Flat Dutch Strap Leaf, White Egg, White Lily, Warly La Crosse, 

 Red Top White Globe, Rennie's Selected White Globe, White Top 

 Strap Leaf, Hunter's Purple Top Globe. 



Between 5 and 15 per cent. Rotted: White Stone, Cow Horn^ 

 Yellow Stone, Green Barrel, Lutton's Imperial Green Globe, White 

 Six Weeks, Milk Globe, Orange Sweet, Long Tankard, Sutton's 

 Favorite P. T. Yellow Hybrid, Sutton's Perfection Green Top Hybrid, 

 Yellow Finland, Large White Norfolk, Sutton's Purple Top Scotch. 



Between 15 and 30 per cent. Rotted: Early Purple Top Murrich, 

 Pomeranian White Globe, Red Globe Norfolk, Purple Top Hybrid, 

 Jersey Lily, Early White Model, Extra Early Milan. 



Betiveen 30 and 50 per cent. Rotted : Orange Jelly, Imperial 

 Green Globe, All Gold, Yellow Globe. 



Between 50 and 65 per cent, Rotted : Yellow Aberdeen Green 

 Top, Yellow Aberdeen Purple Top. 



Fig. 1. A healthy cauliflower plant; uninoculated and grown under tlie same conditions as the 



inoculated plants. 



