TWENTY-SIXTH REPORT OF STATE ENTOMOLOGIST 7 



tion of the Agricultural Extension Service and this office, twen- 

 ty-one cars of federal bait were shipped into the Yellowstone 

 Valley in addition to several cars of new bran and arsenic laid 

 down there early in the season, in exchange for an equal amount 

 of bait shipped from eastern Montana points into North Dakota. 

 Freight on the July shipments was paid by the counties but as 

 a special tariff on grasshopper bait and bait materials had been 

 obtained early in the season, the actual cost per ton of bait 

 received was very low. 



GRASSHOPPERS IN RELATION TO CULTIVATED CROPS IN 1936 



Thirty-six counties engaged in grasshopper control in 1936. 

 Each of fifteen counties used more than 50 tons of poisoned bait, 

 dry basis, and nine used a total of 100 tons each or more. One 

 county, Yellowstone, put out 754 tons. Altogether, farmers, 

 county agents, and county commissioners feel that the campaign 

 was one of the most successful ever carried out in the state 

 although it did not approach in extent and intensity the con- 

 trol work on grasshoppers done in 1934. As will be seen from 

 table 1, over 3,000 tons of dry bait were distributed or enough 

 to give one treatment to 600,000 acres. The actual amount used 

 by farmers in protecting crops on cultivated land was probably 

 more than is indicated by the record given. Much of the saw- 

 dust used in diluting the usual bait ingredients was unaccounted 

 for and many tons of old bait stored on farms came into use 

 without appearing in county totals. The total bait distributed was 

 probably close to 3,800 tons. 



The chief sources of bait were from county and private 

 funds and from the supply of old federal bait left over from 

 the previous two years. The Works Progress Administration 

 furnished 328 tons of bran in 14 counties. The remainder, or 

 402.5 tons came from a special appropriation passed by congress 

 in the latter part of June and administered by the United 

 States Bureau of Entomology and Plant Quarantine. The new 

 federal bait and WPA supplies came late in the season so the 

 above figures do not represent the total amounts received from 

 those sources but only the amounts used. Of the 840 tons of 

 bran in storage for the expected 1937 outbreak of grasshoppers, 

 a large part came from WPA and 97.5 tons from the direct 



