iiir. E. U. Holt of the Biological purvey investigated 
damage to grain by doves in the neighborhood of Phoenix 
Arizona in June 1917. Only one case of serious damage was 
found, that near the tovm of Arlington. 
In experimenting with control measures it wasfound 
that both species of doves were easily killed by a posion 
mixture prepared according to the following formula and svread 
broadcast over the feeding grounds. 
V/heat 40 quarts 
Strychnine alkaloid, powdered 1 ounce 
Soda bicarbonate 1 " 
Starch paste 
Syrup 
1 quart 
4 table sx:ioons. 
