ERADICATING TALL LARKSPUR OX CATTLE RANGES. 



PIG. 4. Larkspur growing on open weed type, on Fishlake National Forest. Approx- 

 imately 1.500 plants per acre. Estimated cost of eradication by grubbing, $5 

 per acre. 



number of plants found on Plot 2A is accounted for by the fact that 

 this area was grubbed by two of the less reliable laborers without 

 adequate supervision and, further, by the fact that it was covered 

 with a thick, tangled growth of willows, which made grubbing very 

 difficult. Plot 5 also was covered with willows, yet the grubbing 

 was 97 per cent effective because the work was done carefully. The 

 effectiveness of the work on Plot 4 was due to the grubbing being 

 done by two reliable workmen and to the fact that this plot contained 

 no brush. The absence of brush, however, was partly offset by the 

 presence of considerable rock and gravel. The larger percentage of 

 plants remaining on Plot 3A in 1916, as compared with Plots 4 and 5, 

 was due to this plot having been grubbed by one of the less reliable 

 men of the crew. If the grubbing had been done consistently on all 

 the plots, it would undoubtedly have been most effective on Plot 3A, 

 followed by Plots 4. 5, and 2A in order. 



In the reexamination of these plots on September 27, 1916, two 

 months after the second grubbing, one plant was found on Plot 3A, 

 none on Plot 4. 15 on Plot 5. and 104 on Plot 2A. Plot 2A was re- 

 grubbed in July, 1916, just after the snow had melted and when the 

 vegetation had barely started to grow. As a consequence, a large 

 number of small plants were overlooked among the willows. 



92679 Bull. 82617 2 



