CULTURAL PRACTICES 



193 



shelled seed can be greatly improved and that the stand from hand-shelled 

 seed is slightly improved by treating with such disinfectants as Ceresan, 

 Arasan, Yellow Cuprocide, Dow 9, and U. S. R. 604. On high-vitality 

 hand-shelled seed, the increase in emergence from treatment is said to 

 average about 5 percent, whereas on seed of low vitality, the increase is 

 proportionately larger. Treatment of high-grade machine-shelled seed, 

 however, increased the stand by 20 to 35 percent. With low-vitality, ma- 

 chine-shelled seed the increase in some cases amounted to many times 

 this percentage. High-vitality machine-shelled seed when treated with a 

 good disinfectant gave about as good a stand as untreated hand-shelled 

 seed of the same lot. Data from which some of these conclusions were 

 drawn are given in tables 27 and 28. 



Seed may be shelled and treated during the winter months when labor 



Table 27. — Average Number of Plants Obtained from 100 Seed Planted in 

 Seed-Treatment Test, Holland, Virginia, 1943-1944 



Treatment, per 100 pounds of seed 



Average number of plants from 100 seed 



Hand-shelled 

 seed 



Machine-shelled 

 seed 



Arasan, 3 oz 



Arasan, 2 oz 



Ceresan, 4 oz 



Ceresan, 3 oz 



Yellow Cuprocide, 4 oz 

 Yellow Cuprocide, 2 oz 



Spergon, 4 oz 



Spergon, 2 oz 



Untreated 



91 

 91 

 93 

 95 

 90 

 87 

 85 

 83 

 63 



Table 28. — Average Number of Plants Obtained from 100 Seed Planted in 

 Seed-Treatment Test, Holland, Virginia, 1945 



Treatment per 100 pounds of seed 



Average number of plants from 100 seed 



U. S. R. 604, 2 oz 



Ceresan, 4 oz 



Dow 9, 2 oz 



Yellow Cuprocide, 4 oz 



Arasan, 3 oz 



Spergon, 4 oz 



Fermate, 3 oz 



Dow 9 B, 2 oz 



Untreated 



