-33 r - 
INSECT PESTS 
GRASSHOPPERS 
Surveys conducted in the fall of 1933 cooperatively by the Bureau of 
Entomology and Plant Quarantine and the States of North Dakota, Montana, 
South Dakota, Idaho, Wyoming, and Minnesota indicated that extremely severe 
grasshopper infestation could be expected in 193^ ia the ITorthcm Great 
Plains and Rocky Mountain regions. This infestation developed about as in- 
dicated "by the surveys, hatching being heaviest in Montana, ilorth Dakota, 
South Dakota, and Minnesota. Grasshoppers were also generally abundant in 
Idaho, Wyoming, Nebraska, Wisconsin, and Michigan. An extensive coopera- 
tive control campaign was organized under Federal funds for the control of 
the anticipated outbreak in these States. As the season progressed it be- 
came evident that widespread control operations would be required in 18 
States, including Arizona, California, Colorado, Iowa, Kansas, Nevada, Now 
Mexico, Oregon, and Utah, in addition to those referred to above. The most 
serious infestation, however, was in the Northern Great Plains and northern 
Rocky Mountain regions, whore grasshoppers hatched in sufficient numbers to 
have caused widespread deva.sta.tion had no control been practiced. The con- 
trol campaign not only prevented any general damage, but undoubtedly very 
materially reduced cqq deposition during the fall, with the result that, 
although there will probably be some serious infestation next year in Idaho, 
Wyoming, Montana, Noith Dakota, South Dakota, Minnesota, Wisconsin, and 
Michigan, the ogg surveys conducted last fall indicate that, except in the 
tv/o last-named States, the infestation is definitely lower than at a corres- 
ponding time in 1933* Extreme drought and high temperatures possibly aided 
in reducing populations in portions of the infested area, although such con- 
ditions necessitated the use of increased quantities of poisoned bait. 
Results of the egg survey last fall (see map) are given in terms cf the 
approximate number of acres of susceptible crcps that will require baiting. 
They are as follows: Arizona, 81,281; California, 101, COG; Colorado, 89,69*1; 
Idaho, 182,468; Iowa, 150,000; Kansas, 102,000; Michigan, 6lO,3S3; Minnesota, 
728, U13. Montana, 6l<4,889; Nebraska, 186,519; Nevada, 107,500; New Mexico, 
l6,40G; North Dakota, 3,368,158; Oregon, 23,800; South Dakota, 275.600; Utah, 
Ho.OOO; Wisconsin, 1,682,668; and Wyoming, 5^6,000. (J. R. Parker, Bureau 
of Entomology and Plant Quarantine, U. S. D. A.) 
CHINCH BUG 
One of the most severe and widespread chinch bug infestations en record 
developed in the Corn Belt during the year. The extremely mild weather and 
the dry spring over a considerable portion of the region permitted a high 
percentage of the large fall population cf bugs to overwinter successfully. 
Migrations began exceptionally early and continued approximately a month in 
many heavily infested areas. States suffering most severely were Missouri, 
Kansas, Illinois, Iowa, and Indiana. Less severe infestations occurred in 
northern Oklahoma, southeastern Nebraska, the northern half of Ohio, and the 
southern parts of Michigan and Minnesota.' Extensive control operations in 
the Corn Belt were required to protect the corn from migrations of bugs from 
small grains, A Eodcrai appropriation maie possible more extensive control 
