Common broomweed (Gutierrezia dracunculoides (DC.) Blake) were effectively controlled with 2,4-D at 0.125, 0.25 or 0.5 lb./acre applied during stem elongation around May 15. The same rates of 2,4-D were less effective when applied in early April prior to complete emergence of the common broomweed seedlings or in mid-June after initiation of floral branches. Picloram combined with 2,4-D at 0.063, 0.125 or 0.25 lb./acre of each herbicide controlled 94 to 100% of the common broomweed population regardless of application date. Dicamba was more effective when applied in early spring than were equal rates of 2,4-D. Control of common broomweed from applications of picloram or dicamba in early April was attributed to residual herbicide activity on seedlings germinated subsequent to treatment. However, no treatment prevented germination and establishment of common broomweed in the fall following application of herbicides in the spring. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.