26 
The Colorado Experiment Station 
Fig. 8.—Sumpter mixing machine used to mix Paris green-bran 
mash, Center, Colorado, 1916. Time required to prepare, mix and sack 
100 lbs., dry weight, of the bran mash, eight minutes. (Original). 
In the San Luis Valley and elsewhere where the Kansas for¬ 
mula for poisoned bait was used, the results obtained, as a whole, 
were entirely satisfactory, the County Agent, E. H. Thomas, 
reporting a gain of from $3 to $5 per acre on something over twen¬ 
ty thousand acres in favor of the treated areas. In many cases a 
complete eradication, instead of control, was effected. The re¬ 
sults are shown in the table on pages 28 and 29, which is compiled 
from information obtained thru a circular letter. 
The question of grasshopper control is a very important one 
in any district where grasshoppers occur in sufficient numbers to 
warrant remedial measures. It is hoped that the results of our 
experimental and field demonstration work will convince the most 
skeptical person that the destruction of this pest in future out¬ 
breaks will be a very simple matter. 
Farmers living in districts where grasshoppers are destruc¬ 
tive or threaten destruction to crops, should organize at an early 
mixing the poison. It consisted of a cylinder sufficiently large to 
hold at least 400 pounds of bran, revolving upon an axle, the 
power furnished by an old Ford machine. Only 100 pounds, dry 
weight, was mixed at a time. This gave plenty of room for mix¬ 
ing. The time required to mix and sack one filling was eight 
minutes. 
