32 MONTANA EXPERIMENT STATION BULLETIN 366 



INDEX 



INSECT CONTROL IN MONTANA, 1937-1938 3 



Grasshopper Control 7 



General conditions during 1937-1938 7 



Grasshopper situation for 1937-1938 10 



For 1937 10 



For 1938 , 12 



Migration of July, 1938 12 



Crop losses as a result of the migration 16 



Crop savings during 1938 16 



Mormon Cricket Control 17 



Mormon cricket situation for 1937-1938 17 



For 1937 17 



For 1938 18 



Effect of Mormon Crickets on the range 20 



OTHER IMPORTANT INSECTS OF THE YEARS 1937-1938 22 



Pale Western Cutworm 22 



Army Worm 22 



Say's Plant Bug 24 



Sugar Beet Webworm , 25 



Cucumber Beetle 26 



Codling Moth 27 



Potato Psyllid 28 



Grass Plant Bug 29 



Leaf-folding Sawfly 30 



Alpine Rock Crawler 30 



Maple Twig Borer 30 



Wooly Elm Aphis 31 



Tomato Worm 31 



Little Earwig 31 



