WHITE BURLEY TOBACCO RESISTANT TO ROOT-ROT. 11 
or third crops of Burley or have reason to suspect that the root-rot 
is present try some of the resistant Burley seed. The grower will 
thus have an opportunity to determine to his own satisfaction the 
cause of tobacco-sick soil and at the same time to compare the type 
and quality of the resistant Burley with that of the ordinary strains. 
For a proper test it is necessary, of course, that some ordinary Bur- 
ley be grown on the diseased soil alongside of the resistant strains 
and handled in the same way in all respects, for otherwise there will 
be no accurate basis for comparison. Two or three strains of the 
resistant Burley seed are available for distribution, and although one 
strain may be slightly better than another, few or no data on this 
point have yet been obtained. Where the land has had a long rest 
from tobacco the resistant type is not recommended, for it will not 
show any improvement over ordinary Burley on healthy soil. The 
value of these new strains lies in their resistance to root-rot; hence, 
there would be no purpose in growing them on land free from this 
disease except in so far as they reduce the injury from root-rot due 
to the transplanting of diseased plants from infested seed beds. 
