MONTANA EXPERIMENT STATION BULLETIN 408 



Grasshopper adult and egg surveys made in the fall of 1940 

 indicated that outbreaks were likely to occur in the south-central 

 and northern half of the State, east of the Divide, with the most 

 severe areas being in Sheridan, Daniels, Roosevelt, Valley, Phillips, 

 Blaine, Hill, Toole, Pondera, Teton, Cascade, Wheatland, Mussel- 

 shell, Yellowstone, Treasure, and Rosebud counties. 



The first reports of eggs hatching were received on May 8 but 

 the general hatch in the south and central part of the State did not 

 occur until May 15. In the northeastern counties no large hatches 

 were observed until May 24. 



Beaverhead .. 1,200 



Big Horn 5,650 



Carbon 



Cascade 165,850 



Chouteau 64,000 



Custer-Powder River 



Daniels 900 



Dawson 3,500 



Fergus 200 



Flathead 33 



Garfield 10,350 



Glacier 21,050 



Golden Valley-Musselshell 127,350 



Hill 25,000 



Judith Basin 85,200 



Lake 1,800 



Lewis and Clark 3,434 



Liberty 6,250 



McCone 



Meagher 2,450 



Petroleum 9,500 



Phillips 



Pondera 495,825 



Powell 8,250 



Prairie 9,950 



Richland 800 



Roosevelt 9,600 



Rosebud 3,250 



Sanders 8,700 



Stillwater 16,600 



Sweet Grass 2,000 



Teton 214,200 



Toole 18,700 



Valley 16,200 



Wheatland 2,500 



Yellowstone 26,500 



TOTAL 1,420,292 



285,425 



22,800 



29,800 



9,500 



3,175 



5,700 



250 



8,950 



76,000 



75,350 



25,450 



6,500 

 50 



22,600 



18,005 

 8,700 



61,000 

 4,350 

 1,275 



155,441 

 817,671 



