Feb. 3,1923 
Cotton-Witty a Seed-Borne Disease 
393 
delinting will undoubtedly reduce the chances of introducing the disease, 
although organisms carried within the seed coat will escape this treat¬ 
ment. 
SUMMARY 
The cotton wilt organism, Fusarium vasinfectum Atk., was isolated 
from strongly surface-sterilized cotton seed, indicating that the organism 
is at times carried on the inside of the seed coat. The pathogenicity of the 
organism was proved by inoculation experiments. Artificially inocu¬ 
lated seed carried the viable organism on the seed lint for at least five 
months. The wilt disease was introduced into wilt-free soil by means of 
artificially infected seed. It is recommended that badly infected fields 
be rejected as a source of seed for planting. 
