April, ’20] 
FLINT: GRASSHOPPER BAIT 
233 
the writer. For this reason it was selected as the substance to be used 
in the first test with these baits. Of course, this bark could not be 
obtained in sufficient quantities to make practical its general use for 
this purpose. Twenty-five pounds of bran and one pound of Paris 
green were mixed dry, and a stiff mash was made by adding water in 
which had been stirred about one-half pound of the ground inner bark 
of the black locust. The generally recommended bait, consisting of 25 
pounds bran, one pound Paris green, two quarts molasses, six lemons 
and water sufficient to make a stiff mash, was mixed at the same time, 
and the two baits applied at the rate of about 10 pounds to the acre in 
a clover field where the hoppers averaged about 25 per square yard. 
The baits were sown early in the morning, and counts of the dead hop¬ 
pers in five square yards made in the afternoon of the next day. The 
results of the test with this material showed nearly as many grasshop¬ 
pers killed where the legume was used instead of the molasses and 
lemons. As the locust bark was difficult to obtain and also hard to 
grind, three pounds of freshly ground green beans were substituted in 
subsequent tests. 
During 1918 and 1919 seven tests were made, using the standard 
bran mash, and in comparison, the same amount of bran and Paris 
green mixed with water containing three pounds of finely ground green 
beans. In all but one of these tests a considerably higher number of 
grasshoppers were killed where the beans were used, as was shown by 
counts of the dead hoppers found by carefully examining five square 
yards of the treated clover fields the second afternoon after the baits 
had been sown. Counts made in this manner in 45 square yards of 
treated clover showed an average of two dead hoppers per square yard 
more in the areas treated with green beans than in those where the 
standard poison bran bait had been used. This is not a very much 
higher kill, but seems to prove rather conclusively that this bait is at 
least as good as the standard mixture. With the present price of 
materials for making these baits, it will cost about 25 cents per acre 
less to treat with the legume bait than with the molasses and lemons. 
This bait has the added advantage that the materials for making it are 
nearly always at hand. 
During the summer of 1919 several experiments were tried in which 
three pounds of freshly ground clover were substituted for the ground 
green beans. The results of these tests showed that the bait made in 
this manner was practically as good as that made with the beans, and 
was a little better than the bran-molasses-lemons bait. Recent work 
of Dr. Morrill in Arizona 1 seems to show that the bran bait without the 
addition of either molasses or lemons is nearly, or quite, as effective as 
1 Jour, of Econ, Ent., Vol 12, p. 337. 
