POISONING by tall larkspur causes heavy losses 

 of cattle in the National Forests each year. Dur- 

 ing the last three years 5,500 head of cattle were lost 

 annually. The most effective way to prevent this 

 loss is to grub out the plants, a method of eradication 

 which gives permanent results; other expedients are 

 likely to be temporary. 



The average cost of eradicating larkspur by grub- 

 bing probably falls between $3.65 and $4.15 per acre 

 on range that is comparatively free from rocks, wil- 

 lows, and brush. For willow and rocky areas about 

 $10 an acre probably represents the maximum cost. 



Results of grubbing work in National Forest 

 ranges, together with the methods of operation, the 

 tools to use, the best time to do the work, and the 

 best way to dispose of the grubbed plants, are given 

 in the following pages. 



