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hopperdozers, and it is quite necessary to drive or sweep the young 
locusts of this species into the pan when it is drawn along, as but com- 
paratively few of them jump high enough to fall into it. 
Poisoning.—Poisoning the young locusts with arsenicals has been 
found to be one of the most effective measures that can be used against 
this insect. There are many mixtures which are very effective, but the 
greatest success has been obtained by a combination of arsenicals and 
fresh horse droppings. One pound of Paris green, or some other con- 
venient arsenical, together with 2 pounds of salt, are thoroughly mixed 
with 60 pounds of fresh horse droppings. The resulting mixture is 
scattered among the young locusts or around the edges of fields which 
it is thought may be invaded. A very convenient receptacle in which 
to make this preparation is a half-barrel. A trowel or paddle can be 
used in scattering the mixture in the desired places. 
The importance of beginning work against the younger stages can not 
be too strongly emphasized, because little can be done to destroy these 
locusts after they have wings and have begun their migrations by short 
fights. By means of a voluntary organization of farmers, a general 
survey of a locality in the fall, aided by the experience of previous years, 
will render it comparatively easy to forecast if the locusts will be abun- 
dant the ensuing season. During the years when they are few, a small 
amount of work will keep them within bounds, or by more extended 
work they may be nearly exterminated. Climatic conditions, parasites, 
and diseases, although often effective, can not be relied upon, and it is 
necessary that well directed and persistent campaigns be undertaken if 
success is to be obtained. 
Approved: 
JAMES WILSON, - 
Secretary of Agriculture. 
WASHINGTON, D. C., November 13, 1903. 
O 
