FORMALIN TREATMENT FOR OAT SMUT 



613 



Average of checks 95 per cent. 



B. Solution — One pint formalin to five gallons of water. 



1. One pint per bushel is safe for any of the hours 



covered. 



2. When two pints are used there is a slight decrease in 



the vitality when covered for six or more hours. 



3. Four pints may be used with safety when covered 



not to exceed one hour. 



4. Larger applications and continuous covering lower 



the percentage of germination to zero, especially 

 after the second or fourth hour of covering. 



5. Field tests showed that all plots were below the av- 



erage of the checks. 

 The plots seeded with the grain treated with six pints 

 and covered zero and one hour germinated a lit- 

 tle slowly, showing a decrease in stand of 50 to 

 60 per cent. However, at harvest time the yield 

 was practically normal. Those plots seeded with 

 the other treatments of the six and eight pints 

 failed to germinate except occasionally could be 

 seen a stray plant thai had survived. 



C. Solution— One pinl formalin to ten gallons of water. 



1. Germination tests indicate that one pint per bushel 

 may be covered for a period of twelve hours with- 

 out any apparent injury. 



