ERADICATING TALL LARKSPUR ON CATTLE RANGES. 



The grubbing in 1915 was done by a crew of eight inexperienced 

 laborers under the direction of a forest officer. The results both 

 as to cost and as to effectiveness of eradication should be applicable 

 to similar conditions elsewhere. 



The effectiveness of grubbing on the plots selected ior special 

 study is indicated by the data in Tables 1 and 2. The plots estab- 

 lished in 1913 were reexamined and regrubbed in 1914, 1915, and 

 1916. Those established in 1915 were reexamined and regrubbed in, 

 1916. 



TABLE 1. Effectiveness of eradication by grubbing on selected plots established 



in 1913. 



TABLE 2. Effectiveness of eradication bij grubbing <> i>lot* established and 



grubbed in 1915. 



On the plots established in 1913 only a little over 6 per cent of the 

 plants were still alive the first year after eradication, while an average 

 of 5 per cent were still surviving the second year. An examination 

 made in July of the third season showed tnat eradication was com- 

 plete on two plots. On the third plot were 24 seedlings. The seed 

 producing most of these had undoubtedly been brought down during 



