20 
Colorado Agricultural College 
out, and positive results were obtained thru a treatment for 40 to 60 
minutes. 
Method of Disinfecting the Seed 
Solution Required : One pint of 40-percent formalin mixed with 
40 to 45 gallons of water. Formalin is sold by nearly all druggists 
at a price ranging from 50 to 70 cents per pint. The solution should 
always be of guaranteed 40-percent strength. 
Application to Grain: Two methods may be used according to 
the preference of theh farmer. Both are equally successful; the same 
strength of formalin solution is used in both methods. 
Immersion Method 
1. Use a barrel or any vessel of convenient size. 
2. Put a sufficient amount of the solution into the vessel to im¬ 
merse a sack of seed. 
3. iLeave plenty of room in the sacks; if it is filled too full, the 
solution will penetrate the interior of the sack with difficulty. 
4. Put the sack of grain into the solution, move or dip it so 
that the solution can readily get to the interior of the sack and thoroly 
wet the grain. A block and tackle will be found very useful to raise 
and lower the sack, tho it is not necessary. 
5. Ueave the seed in teh solution not less than 40 minutes or 
more than i hour. 
6. Raise the sack and allow to drain back into the vessel. Then 
em.pty in a pile upon a clean floor, and cover with wet cloth or gunny 
sack in order to prevent the escape of the formalin gas. 
7. At the end of two hours spread the grain out to dry. Shove¬ 
ling over frequently will help materially in drying it, or if a draught 
can be lead over it the drying will proceed much faster. To further 
facilitate drying, the grain should be spread as shallow as possible, 
one inch or so in depth, if possible. 
TABLE V.—RESULTS OP EXPERIMENTS IN SEED DISINFECTION 
(Percentage of Smut After Treatments 
Sprinkle Method 
Immersion Method 
Varieties 
U. crameri 
U. panici-mil- 
iacei 
U. crameri 
IT. panici-mil- 
iacei 
Broom Corn Millet none 
none 
none 
none 
Common 
»» 
»( 
t» 
German 
o.t 
♦ t 
r f 
»» 
Hungarian 
t ♦ 
♦ • 
f f 
ft 
Japanese 
f f 
* t 
*' 
ff 
Kursk 
* ’ 
’' 
11 
Pearl 
• • 
• • 
» • 
ft 
Proso 
• • 
” 
* t 
ft 
Siberian 
1 * 
r # 
t$ 
