DIV. INSECTS,’ 
UNITED STATES DEPARTMENT OF AGRICULTURE 
FARMERS’ 
BULLETIN 
WasuineTon, D.C, 691 NovemsBer 11, 1915 
Contribution from the Bureau of Entomology, L. O. Howard, Chief. 
GRASSHOPPERS AND THEIR CONTROL ON SUGAR 
BEETS AND TRUCK CROPS. 
By F. B. MinirKen, 
Scientific Assistant, Truck Crop and Stored Product Insect Investigations. 
INTRODUCTION. 
Grasshoppers May injure crops in many parts of the United States, 
although the area having an annual rainfall of less than 25 inches 
is more subject to their attacks. This includes the country lying 
west of the Mississippi 
River, with the excep- 
tion of a strip from 100 
to 200 miles wide bor- 
dering that river, and 
a portion of the northern 
Pacific States. In the 
eastern part of the semi- 
arid region about equal 
damage is done to up- 
land and lowland crops. 
Farther west the ab- 
sence of upland vegeta- 
tion formerly confined Fic. 1.—Map of Kansas and neighboring States, showing location 
the insects to the bot- of grasshopper outbreaks during the years 1911, 1912, and 1913. 
toms along streams (078i!) 
where they destroyed a much larger proportion of the crops. 
In recent outbreaks all of the grasshoppers concerned have been 
native species whose ravages have been limited to crops in the neigh- 
borhood of their birthplace, and unless control measures are adopted 
against them further agricultural development of the semiarid region 
4756°—Bull. 691—15 
