NINETEENTH EEPORT OF STATE ENTOMOLOGIST 



TABLE IV.— GRASSHOPPER CAMPAIGN, 1922— COUNTIES IN WHICH THE 

 INSECT PEST LAW WAS NOT OPERATED 



p Approximate Tons bait Acreage Estimated 



funds used used treated saving 



Blaine ?5.€00.00 80.5 13.375 $135,000 



Broadwater 20 2,000 



Chouteau 19,000.00 400 64,400 400,000 



Custer 3,200.00 55 9,160 



Hill 2,370.13 25 4,000 160,000 



Jefferson 12.2 1,220 



Lewis and Clark..... 1,100.00 80 10,000 200,000 



Ravalli 32.90 .7 



Rosebud 25 2,000 



Total $31,.30.3.03 698.4 106,155 §895,000 



TABLE v.— SUMMARY OF GRASSHOPPER CAMPAIGNS. 1921 AND 1922 



For Counties Which Operated Insect Pest Law 1921 1932 



Number of counties 26 34 



Funds expended (practically all for materials) !?90,272..54 $153,696.76 



Tons of poisoned braii mash distributed. 3,204.2 4,880.8 



Acres of laud treated 280,922 633,396 



Estimated saving to crops* $475,322.00 $1,582,1.50.00 



For Counties Which Did NOT Operate Insect Pest Law 



Number of counties 8 9 



Funds expended (mostly for materials) $4,462.95 $31,303.03 



Tons of poisoned bran mash distributed 169 698.4 



Acres of land treated 15,30.3 106.155 



Estimated saving to crops* $27,790.00 $895,000.00 



For All Counties 



Number of counties 34 43 



Funds expended $94,735.59 $184,999.79 



Tons of poisoned bran mash distributed 3, .373. 2 5,579.2 



Acres of land treated _ 296,227 7.39.551 



Estimated saving to crops* $50.3,112.00 .$2,477,150.00 



*See paragraph on "estimated crop saving." 



and to some extent along the eastern slope, is primarily the wai-rior 

 grasshopper. This species always shows a greater tendency to congre- 

 gate for egg-laying than does any other common species in the State. 

 Accordingly, it is easier to f orsee outbreaks of the warrior grasshopper, 

 because the egg-beds can be actually measured in a definite way and 

 the extent of the infestations known pretty well beforehand. Further- 

 more, and for the same reason, when the hoppers begin to hatch they 

 are at first very much bunched so that a small amount of poison used 

 at the most propitious time will destroy the young in enormous num- 

 bers. On the other hand, the lesser-migratory grasshopper in the 

 central and eastern sections does not deposit its eggs in well defined 



