In a tarweed infested soil in the greenhouse, intermediate and crested wheatgrass and smooth brome seedlings growing with tarweed were sprayed with 2,4-D at 0.5, 1, 2, and 4 lb/A when seedlings had 1 to 2, 2 to 4, or 5 to 10 leaves. Tarweed was controlled at all rates. With simulated fall seedling, the higher the rate of 2,4-D and the younger the grass, the greater the injury to the grass. With simulated spring seeding, all rates of 2,4-D damaged the grass, but spraying at 0.5 or 1 lb/A of 2,4-D just after seeding resulted in the least damage. The field study indicated that .5 lb/A 2,4-D killed 90% of the tarweed; 1 lb/A killed 95% and 2 lb/A killed 99%. Rate of spraying had little effect on survival of the grass. 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.