ERADICATING TALL LARKSPUR OX CATTLE RANGES. 



13 



TABLE 4. Cost of extensive larkspur eradication. 



It is believed that from $3.65 to $4.15 per acre represents a con- 

 servative average cost of eradicating larkspur on areas relatively 

 free from rocks, willows, and brush. 



The average cost of $10.10 per acre for the Stanislaus work un- 

 doubtedly represents a maximum cost for any eradication work, be- 

 cause all conditions making grubbing difficult and costly were en- 

 countered. This figure, therefore, is a conservative one to use in es- 

 timating the expense of grubbing in all willow or rocky areas. 



The cost of regrubbing the experimental plots was about one-tenth 

 of the cost of the original grubbing. In regrubbing larger areas the 

 cost should not exceed $1 per acre, and in most cases should be about 

 half that. 



FIG. 5. Larkspur growing on a rocky habitat on the Fishlake National Forest. Alti- 

 tude 10,100 feet. Approximately l.."00 plants per acre. Estimated cost of eradica- 

 tion by grubbing, $10 per acre. 



