-w^ 
INSECT PESTS 
GRASSHOPPER A3UNDAUCE 
Grasshoppers hatched in about the numbers predicted by the I93H fall 
egg survey, except in a few counties. Weather conditions during and follow- 
ing the hatching season hilled many young hoppers. This ras particularly 
true in the Upper Peninsula of Michigan, and in northern Wisconsin, western 
Minnesota, ?nd eastern North Dakota, in all of which areas heavy infestations 
had been predicted. Hervy rains occurred while hatching was in progress and 
periods of heavy hatching were followed by frequent rains, high humidity, 
cloudiness, and low temperature, conditions unfavorable to first-instar grass- 
hoppers. In all of these areas great numbers of young hoppers were actually 
seen in many localities at hatching time but had about disappeared when the 
fields were visited several weeks later. Vigorous and succulent growth of 
native, vegetation and crops, combined with unusually late hatching, prevented 
early damage to crops and tended to obscure the dangerous numbers of grass- 
hoppers surviving in areas where weather conditions had been favorabls. Con- 
siderable damage to late-maturing crops occurred in western North Dakota, 
western South Dakota, south-central Montana, northern Wyoming, and western 
Iowa. Injury to range grass was serious throughout the Rocky Mountain region, 
being particularly severe in Montana, where the loss was estimated at 
$500,000. The marked decrease in severity of the 1935 outbreak, as compared 
with that of 193^1 can ^ e judged from the following table which shows the 
quantity of bait used in the various States during the 2 years. 
State 
Bait used in. 
State 
JSJk 1225- 
Bait used in. 
iw iq^ 
Arizona. . . . 
California. 
Colorado. . , 
I daho , 
I owa , 
Kansrs 
Michigan. . , 
Total, 
Tons i 
355 
U53 
1,636 
339 
200 
537 
1,195 
Tons ;• 
122 :: Minnesota..., 
326 :: Montana 
733 '>'• Nevada 
13 :: North Dakota. 
600 :: South Dakota. 
2b0 :: Wisconsin. . . , 
900 " Wyoming , 
Tons 
i'ooo 
16,755 
17S 
23,667 
7,522 
5,096 
5,250 
67,6S3 
Tor.s 
331 
2,000 
150 
980 
500 
150 
785 
7,310 
(J. R. Parker, Bureau of Entomology and Plant Quarantine, U. S, D. A.) 
GRASSHOPPER SURVEY 
The results of the fall grasshopper survey for 1535 (see mat)) are 
given by showing the number of counties in each State having an average in- 
festation rated as very severe ( 50 to 100 percent), severe (25 to U9 percent), 
and local (5 to 2k percent). Very severe infestations were found in 2 coun- 
ties in Michigan, 2 in Montana., and 2 in Nebraska. Severe infestations were 
found in 17 counties in Kansas, 12 in Michigan, 12 in Nebraska, 10 in Montana? 
8 in North Dakota, 6 in Iowa, 3 in Wyoming, 2 in Wisconsin, 2 in Nevada, 1 in 
Colorado, and 1 in Utah. Infestations were more or less local in South Dakota, 
Minnesota, and New Mexico, and were local in Idaho and California. 
