Koford Cynomys ludovicianus September 12, 1955 Fugete + Bocus say boddgers rarely killed by 1080 poisoned meat, but sometimes tunnel under the bait (Barnes, S. Dely says likewise). // [illegible] parts of typed History of Predator and Rodent Control, Colorado District, compiled by Fugete, 1910-1916; field parties of Biol. Survey did some prairie dog control, especially on National Forests, 1920 (fiscal yrs.) Survey showed 13 million acres rodent infestation, 10 million being prairie dogs. 1921, 10,540 lbs. rodent bait distributed. A Letter reported that in Douglas Co., 1921, they were "near the goal in the work of exterminating the prairie dogs..." [Control still going active] (Stanley Young in charge predator control 1921). Organized rodent control started Nov. 1, 1919. Joseph Keyes supervised in Cb.-Kansas district then (1924 left). 1925, 157,965 qts. bait used, 643,809 acres treated, in 53 counties. 1928, 121,241 qts. bait used on 593,108 A., for rodents. Thallium used on small scale. Ca CN used for cleanup work (1780 lbs. used), a Carbon Disulfide (100 lbs.). (Ben Candell started or Austin; now is agent at Montana). 1929, 101,735 lbs. bait put on 498,510 acres (11,480 for ground squirrels; most rest for prairie dog). These figures include all 4 forms of prairie dogs. Counties & wood growers association, 4 state contributions. 1930, more thallium used. 6,237 lbs., + 44,444 lbs. strychnine oats. 1931 (Dow Brown Leader, prod. 4 rod. control). 220,073 lbs. bait distributed on 737,627 A. 1934, E.C.W. and IMPNIRA funds supported rodent control. 1936, still control by ECW camps of USFS, Indian S., Reclamation Service, Soil Cons. Service; 170,402 lbs. bait on 568,144 A. 1937, now thallium seed. ZOB 258