8 FARMERS’ BULLETIN 637. 
use and where to use them. There is no doubt whatever that if this 
measure were put into operation at the proper time, in whatever 
manner is most practicable, disastrous outbreaks the following 
spring would be forestalled and prevented. Except in cases of 
isolated farms or ranches, there should by all means be concerted 
action in this movement. 
Where fields can be quickly inundated and the water promptly run 
off, as is frequently done in rice fields, the young grasshoppers may 
be killed by flooding the field for a day or two just as the eggs are 
hatching. If close watch is kept to determine just when the young 
grasshoppers are hatching, and prompt action taken at this time, - 
much good can be accomplished; but as soon as the young begin to 
move about flooding will avail but little, as the grasshoppers will 
climb to the upper part of vegetation beyond the reach of the water. 
DESTROYING THE INSECTS. 
Those measures which should be resorted to when the grasshop- 
pers, having hatched from the egg, are threatening alfalfa fields from 
within or without, or both, will now be discussed. 
The hopperdozer.—On level or comparatively level land the hop- 
perdozer can be used to good advantage in collecting grasshoppers 
of all ages—from the youngest to the adults. There are many modi- 
fications in the construction of these implements, but the form here 
described and figured has been made for the writer, and he has 
employed it in the fields and knows from experience that its use is 
both practicable and efficient. It is constructed of sheet iron, pref- — 
erably galvanized, of reasonable thickness to insure strength, and, 
xcept for the end pieces, made of a single sheet 10 or 12 feet long 
and 26 inches in width. The front is formed by turning up one edge 
», couple of “aches, and the back may be turned up a foot, thus 
making a shallow pan 1 foot wide, with the back the same height 
and with a front 2 inches high. Ends are riveted in and soldered, 
as shown in figure 8. Runners of old wagon tire are placed at each 
end (a, 6), and another in the center (c) is turned over in the front 
and back to strengthen the pan at these points. These runners are 
riveted to the pan, as shown, and should extend both backward and 
forward in order to overcome to some extent the inequalities of the 
ground and cause the hopperdozer to run more smoothly. By solder- 
ing it about the heads of the rivets the pan will be made water-tight. 
The pan is filled with water, on which is poured enough kerosene to 
cover it with a film, a horse is hitched to the end runners, and the out- 
fit is then ready for use. As the hopperdozer is drawn over the 
ground the locusts will either jump into the kerosene and water 
direct or against the back and drop into it and there be killed. By 
using longer, wider, and heavier sheet iron a larger and stronger pan 
