Skip to main content Accessibility help
×
Home

Herbicidal Control of Tall Larkspur

  • Paul J. Torell (a1) and Robert H. Haas (a2) (a3)

Abstract

Herbicidal control of tall larkspur, Delphinium occidentale Wats. was investigated in the Sawtooth National Forest near Oakley, Idaho. When larkspur was in a prebud stage, 4 and 8 lb/A of the propylene glycol butyl ether esters of 2-(2,4,5-trichlorophenoxy)propionic acid (silvex) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) gave good control, with significant increases in yield of native grasses. At the bud and flower stages neither herbicide gave satisfactory control at 12 lb/A. Granular silvex at 400 lb/A total product (80 lb/A ae) killed all larkspur with only slight injury to rabbitbrush, sagebrush, and native grasses. A chlorate-borate (25%–75%) mixture gave a complete larkspur kill at 1740 lb/A.

Copyright

References

Hide All
1. Aldous, A. E. 1916. Eradicating tall larkspur on cattle ranges in the National Forests. U. S. Dept. Agr. Farmers' Bull. 826.
2. Anonymous. 1958. Sixteen plants poisonous to livestock in the western states. U. S. Dept. Agr. Farmers' Bull. 2106.
3. Baker, Laurence O. 1958. Control of tall larkspur, Delphinium occidentale, with herbicides. Res. Prog. Rept. WWCC. pp. 3637.
4. Beath, O. A., Gilbert, C. S., Eppson, H. W., and Rosenfeld, Irene. 1953. Poisonous plants and livestock poisoning. Wyoming Agr. Expt. Sta. Bull. 324.
5. Bohmont, Dale W. 1952. Chemical control of poisonous range plants. Wyoming Agr. Expt. Sta. Bull. 313.
6. Clawson, A. B. 1934. Larkspur or poison weed. U. S. Dept. Agr. Farmers' Bull. 988.
7. Davis, Ray J. 1955. Flora of Idaho. Wm. C. Brown Co., Dubuque, Iowa.
8. Klomp, Gerard J. 1960. Effects of amitrole, 2,4-D, and PBA on tall larkspur. Res. Prog. Rept. WWCC. p. 15.
9. Tucker, J. M., Cordy, D. R., Berry, L. J., and Harvey, W. A. 1960. Poisonous larkspur identification and control. California Agr. Expt. Sta. Ext. Ser. Leaflet 129.

Herbicidal Control of Tall Larkspur

  • Paul J. Torell (a1) and Robert H. Haas (a2) (a3)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed