26 
Colorado Experiment Station 
entirely successful. One person can handle the mixer while another 
thoroughly mixes the grain. 
4. Shovel treated grain into pile and cover with canvas or 
gunny sack that has previously been dipped into formalin solution. 
Leave covered about six hours, but not more than twelve hours. 
5. Spread grain out not more than 2 inches deep and allow to 
dry. 
6. The grain should be put into clean sacks or stored in 
a clean bin so as to prevent spores from coming in contact with 
it. In no case should it be returned to the bin from which it 
was taken unless the bin has been cleaned with formalin solution. 
Sweeping in the granary before the treated grain has been removed 
should never be done, since large quantities of smut spores which 
settle on the floor and walls may find their way back again to the 
grain. 
Fig. 8.—The sprinkle method of treating grain for smut: One man sprinkles the 
grain with the formalin solution, while the other thoroughly mixes the 
grain and solution by shovelling over and over. 
By the use of this sprinkle method, two men can treat large 
quantities of seed in a short time, and it is preferred for treatment 
of any considerable amount of grain. Either method is entirely sat¬ 
isfactory and efficient. 
Recommendations: 
1. All utensils, such as sacks, seeders, etc., if likely to be con¬ 
taminated, should be cleaned with formalin before being used. 
